Experimental Animal Division

▼Genetic QC tests:

• Genetic QC tests are performed at deposition or before distribution, and the test results and/or protocols are posted in the web catalog.
• Performed tests for each strain classification are shown in the Table below.

 

Strain Classification*	Genetic QC Test: Performed (◯), Performed for only some strains (△), Not-Performed (—)
	Transgene-specific PCR1)	Targeted gene-specific genotyping PCR2)	KO-survey3)	loxP/FRT-survey4)	Detection of BAC-loxP5)	Genetic background test6)
TG	〇	—	〇	—	—	—
BAC-TG	〇	—	〇	—	〇	—
cTG	〇	—	〇	〇	—	—
KO, KI, CRISPR/Cas9	—	〇	〇	—	—	—
cKO	—	〇	〇	〇	—	—
Spontaneous/ ENU-induced mutant	—	△	〇	—	—	—
Inbred	—	—	—	—	—	△
Wild-derived	—	—	—	—	—	△

Performed:

1.  Transgene-specific PCR: A PCR test by using transgene-specific primers designed based on information provided by the Depositor to detect the promoter and the gene driven by the promoter.
2.  Targeted gene-specific genotyping PCR: A PCR test by using targeted gene-specific primers designed based on information provided by the Depositor. The test results and/or protocols of spontaneous and ENU-induced mutant strains are posted in the web catalog when tested.
3.  KO survey: PCR tests for TG, BAC-TG, cTG, KO, KI, CRISPR/Cas9, cKO and spontaneous/ENU-induced mutant strains to detect any contamination with other genetically-modified mice by using primers for 10 representative marker genes (neo, Pgk-neo, Tk-neo, IRES, lacZ, GFP, Cre, Flp, Puro, and Hyg, Nakata H et al. Exp Anim 58: 437-442, 2009).
4.  loxP/FRT-survey: PCR tests of cTG and cKO mice to examine the fragment length between loxPs or FRTs with primers designed based on information provided by the Depositor. Confirmation of structure of conditional alleles which carry loxP or FRT. Nakata H et al. Genes Cells, 2021
5.  Detection of BAC-loxP: A PCR test for BAC-TG to detect loxPs derived from BAC vectors.
6.  Genetic background test: PCR tests for the genetic background of inbred and wild-derived strains by using microsatellite or single nucleotide polymorphism (SNP) markers. Test results are posted in the web catalog when tested.

Not performed:

• Sequence analysis of genomic region or mutated gene: Sequencing of transgenes, targeted genes or any other mutated genes of TG, BAC-TG, cTG, KO, KI, CRISPR/Cas9, cKO and spontaneous/ENU-induced mutant strains.
• Analysis of integration site of the transgene on the genome.
• Expression analysis: RT-PCR, Northern hybridization, Western blotting, Detection of reporter genes such as GFP and lacZ.
• Autopsy, histopathology, FACS and other phenotypic analyses requiring special equipment and/or expertise.
• Southern hybridization.
• Karyotyping, FISH and chromosome painting.

Supplemental tests:

• When any of Not-performed QC tests described above or any other QC tests are performed, the test results and/or protocols are posted in the web catalog.
• When any of Not-performed QC tests described above or any other QC tests are requested by users and feasible in our division, the tests can be performed at the users’ expense. The test results and/or protocols are posted in the web catalog.

▼Microbial QC tests:

• Microbial QC tests are performed quarterly by using dirty bedding sentinel mice housed in each rack. Test results are posted in the web catalog.
• Deposited mice are housed separately based on the microbial test results at deposition, and then, all the mice are cleaned-up by a rederivation procedure.
• We aim to eliminate all tested pathogens after rederivation. When any positive test result is obtained in a strain, we notify the recipient of the strain directly and post an alert in the home page.

Strains subject to microbial QC tests*	Classification of pathogens subject to microbial QC test: Performed (◯), Not-performed (—)
	Class A	Class B	Class C	Class D
	Clostridium piliforme (Tyzzer’s organism), Ectromelia virus, Hantaan virus**, Lymphocytic choriomeningitis virus (LCMV), Mouse hepatitis virus (MHV), Mycoplasma pulmonis, Salmonella typhimurium, Sendai virus (HVJ)	Filobacterium rodentium, Citrobacter rodentium, Corynebacterium kutscheri, Dermatophytes**, Ectoparasites, Helicobacter bilis, Helicobacter hepaticus, Intestinal protozoa, Pasteurella pneumotropica, Pinworms, Salmonella spp.	Stapylococcus aureus, Pneumocystis murina, Pseudomonas aeruginosa	Lactate dehydrogenase elevating virus (LDHEV), Mouse adenovirus (MAV), Mouse cytomegalovirus (MCMV), Mouse minute virus (MMV), Mouse norovirus (MNV), Mouse parvovirus (MPV), Mouse polyoma virus (Poly), Mouse rotavirus (EDIM), Pneumonia virus of mice (PVM), Reovirus type 3 (Reo 3), Theiler’s mouse encephalomielitis virus (TMEV)
General strain	〇	〇	—	—
Immuno-deficient strain	〇	〇	〇	—

Performed:

Not performed:

• Class C tests for general strains.
• Class D tests.
• Tests for other pathogens not in Class A, B, C or D.
• Tests of a mouse directly from the requested strain.

Supplemental tests:

• When Not-performed QC tests are requested by users, the tests are performed at the users’ expense.

 

▼Recovery tests for live mice

Performed:

• Tests of the recovery rate of cryopreserved embryos after thawing and transferring to recipient females. The test results are posted in the web catalog.

▼Genetic QC tests

• Genetic QC tests are performed by using deposited mice, parental mice of frozen embryos and recovered mice from the recovery tests. The test results and/or protocols are posted in the web catalog.
• Genetic QC tests of frozen embryos themselves are not performed.
• Performed tests for each strain classification is shown in the Table below.

Strain Classification*	Genetic QC Test: Performed (◯), Performed for only some strains (△), Not-Performed (—)
	Transgene-specific PCR1)	Targeted gene-specific genotyping PCR2)	KO-survey3)	loxP/FRT-survey4)	Detection of BAC-loxP5)	Genetic background test6)
TG	〇	—	〇	—	—	—
BAC-TG	〇	—	〇	—	〇	—
cTG	〇	—	〇	〇	—	—
KO, KI, CRISPR/Cas9	—	〇	〇	—	—	—
cKO	—	〇	〇	〇	—	—
Spontaneous/ ENU-induced mutant	—	△	〇	—	—	—
Inbred	—	—	—	—	—	△
Wild-derived	—	—	—	—	—	△

▼Microbial QC tests:

• Microbial QC tests are performed using recipient females of the embryos or foster mothers used in the recovery test for live mice.
• We aim to eliminate all tested pathogens after rederivation. When any positive test result is obtained in a strain, we notify the recipient of the strain directly and post an alert in the home page.

Strains subject to microbial QC tests*	Classification of pathogens subject to microbial QC test: Performed (◯), Not-performed (—)
	Class A	Class B	Class C	Class D
	Clostridium piliforme(Tyzzer’s organism), Ectromelia virus, Lymphocytic choriomeningitis virus (LCMV), Mouse hepatitis virus (MHV), Mycoplasma pulmonis, Salmonella typhimurium, Sendai virus (HVJ)	Filobacterium rodentium, Citrobacter rodentium, Corynebacterium kutscheri, Dermatophytes, Ectoparasites, Helicobacter bilis, Helicobacter hepaticus, Intestinal protozoa, Pasteurella pneumotropica, Pinworms, Salmonella spp.	Stapylococcus aureus, Pneumocystis murina, Pseudomonas aeruginosa	Lactate dehydrogenase elevating virus (LDHEV), Mouse adenovirus (MAV), Mouse cytomegalovirus (MCMV), Mouse minute virus (MMV), Mouse norovirus (MNV), Mouse parvovirus (MPV), Mouse polyoma virus (Poly), Mouse rotavirus (EDIM), Pneumonia virus of mice (PVM), Reovirus type 3 (Reo 3), Theiler’s mouse encephalomielitis virus (TMEV)
General strain	◯	◯	—	—
Immuno-deficient strain	◯	◯	◯	—

* Strains of highly sensitive to Class C pathogens by defects such as disruption of immune-related genes are designated as immuno-deficient strains and separately handled from general strains with special care for the microbial control. Since some general strains can be sensitive to Class C pathogens depending on housing environments and experimental conditions, it is necessary for a user to consider an appropriate microbial control of such strain with reference to information of the strain.

Performed:
A “◯” mark in the Table indicates that pathogens in the Class are tested by detecting antibody production, culturing and PCR and etc.Not performed:

• Class C tests for general strains.
• Class D tests.
• Tests for other pathogens not in Class A, B, C or D.
• Tests of a mouse directly from the requested strain.

Supplemental tests:

• When tests of recipient females or foster mothers themselves are requested by users, the tests are performed at user’s expense.
• When tests of mice for distribution are requested by users, the tests are performed at user’s expense.
• When Not-performed QC tests which are requested by users and feasible by using frozen sera and/or organs of sperm donor males, the tests are performed at the users’ expense.
• When Not-performed QC tests are requested by users, the tests are performed at the users’ expense.

▼Sperm Quality test
Performed:

• Evaluation of the motility of fresh sperm and the concentration of the sperm suspension prior to freezing.

Not performed:

• Recovery test of live mice from frozen sperm.

Supplemental test:

• For strains that live mice are recovered from frozen sperm by in vitro fertilization, the results are posted in the web catalog.

▼Genetic QC tests

• Frozen sperm is produced by using genotyped male donors.
• Genetic QC tests of deposited mice and sperm donor males are performed. The test results and/or protocols and are posted in the web catalog.
• Genetic QC tests of frozen sperm are not performed.
• Performed tests for each strain classification is shown in the Table below.

Strain Classification*	Genetic QC Test: Performed (◯), Performed for only some strains (△), Not-Performed (—)
	Transgene-specific PCR1)	Targeted gene-specific genotyping PCR2)	KO-survey3)	loxP/FRT-survey4)	Detection of BAC-loxP5)	Genetic background test6)
TG	◯	—	◯	—	—	—
BAC-TG	◯	—	◯	—	◯	—
cTG	◯	—	◯	◯	—	—
KO, KI, CRISPR/Cas9	—	◯	◯	—	—	—
cKO	—	◯	◯	◯	—	—
Spontaneous/ ENU-induced mutant	—	△	◯	—	—	—
Inbred	—	—	—	—	—	△
Wild-derived	—	—	—	—	—	△

*TG: transgenic mice, BAC-TG; transgenic mice generated by using BAC clone, cTG: conditional transgenic mice, KO: knockout mice, KI: knock-in mice, cKO: conditional knockout mice, CRIPR/Cas9: Endonuclease-mediated mice.

Performed:

1. Transgene-specific PCR: A PCR test by using transgene-specific primers designed based on information provided by the Depositor to detect the promoter and the gene driven by the promoter.
2. Targeted gene-specific genotyping PCR: A PCR test by using targeted gene-specific primers designed based on information provided by the Depositor. The test results and/or protocols of spontaneous and ENU-induced mutant strains are posted in the web catalog when tested.
3. KO survey: PCR tests for TG, BAC-TG, cTG, KO, KI, CRISPR/Cas9, cKO and spontaneous/ENU-induced mutant strains to detect any contamination with other genetically-modified mice by using primers for 10 representative marker genes (neo, Pgk-neo, Tk-neo, IRES, lacZ, GFP, Cre, Flp, Puro, and Hyg, Nakata H et al. Exp Anim 58: 437-442, 2009).
4. loxP/FRT-survey: PCR tests of cTG and cKO mice to examine the fragment length between loxPs or FRTs with primers designed based on information provided by the Depositor. Confirmation of structure of conditional strains which carry loxP or FRT flanked alleles. Nakata H et al. Genes Cells, 2021
5. Detection of BAC-loxP: A PCR test for BAC-TG to detect loxPs derived from BAC vectors.
6. Genetic background test: PCR tests for the genetic background of inbred and wild-derived strains by using microsatellite or single nucleotide polymorphism (SNP) markers. Test results are posted in the web catalog when tested.

Not performed:

• Sequence analysis of genomic region or mutated gene: Sequencing of transgenes, targeted genes or any other mutated genes of TG, BAC-TG, cTG, KO, KI, CRISPR/Cas9, cKO and spontaneous/ENU-induced mutant strains.
• Analysis of integration site of the transgene on the genome.
• Expression analysis: RT-PCR, Northern hybridization, Western blotting, Detection of reporter genes such as GFP and lacZ.
• Autopsy, histopathology, FACS and other phenotypic analyses requiring special equipment and/or expertise.
• Southern hybridization.
• Karyotyping, FISH and chromosome painting.

Supplemental tests:

• When any other QC tests are performed in supplement, the test results and/or protocols are posted in the web catalog.
• When Not-performed QC tests are requested by users and feasible in our division, the tests can be performed at the users’ expense. The test results and/or protocols are posted in the web catalog.

▼Microbial QC test
Not performed:

• Microbial QC tests of sperm donor males and sperm itself are not performed.

Supplemental tests:

• When Not-performed tests which are requested by users and feasible by using frozen sera and/or organs of sperm donor males, the tests are performed at the users’ expense

▼Genetic QC tests:

• Genetic QC tests are performed at deposition or before distribution, and the test results and/or protocols are posted in the web catalog.
• Performed tests for each strain classification are shown in the Table below.

Strain Classification*	Genetic QC Test: Performed (◯), Performed for only some strains (△), Not-Performed (—)
	Transgene-specific PCR1)	Targeted gene-specific genotyping PCR2)	KO-survey3)	loxP/FRT-survey4)	Detection of BAC-loxP5)	Genetic background test6)
TG	◯	—	◯	—	—	—
BAC-TG	◯	—	◯	—	◯	—
cTG	◯	—	◯	◯	—	—
KO, KI, CRISPR/Cas9	—	◯	◯	—	—	—
cKO	—	◯	◯	◯	—	—
Spontaneous/ ENU-induced mutant	—	△	◯	—	—	—
Inbred	—	—	—	—	—	△
Wild-derived	—	—	—	—	—	△

*TG: transgenic mice, BAC-TG; transgenic mice generated by using BAC clone, cTG: conditional transgenic mice, KO: knockout mice, KI: knock-in mice, cKO: conditional knockout mice, CRIPR/Cas9: Endonuclease-mediated mice.

Performed:

1. Transgene-specific PCR: A PCR test by using transgene-specific primers designed based on information provided by the Depositor to detect the promoter and the gene driven by the promoter.
2. Targeted gene-specific genotyping PCR: A PCR test by using targeted gene-specific primers designed based on information provided by the Depositor. The test results and/or protocols of spontaneous and ENU-induced mutant strains are posted in the web catalog when tested.
3. KO survey: PCR tests for TG, BAC-TG, cTG, KO, KI, CRISPR/Cas9, cKO and spontaneous/ENU-induced mutant strains to detect any contamination with other genetically-modified mice by using primers for 10 representative marker genes (neo, Pgk-neo, Tk-neo, IRES, lacZ, GFP, Cre, Flp, Puro, and Hyg, Nakata H et al. Exp Anim 58: 437-442, 2009).
4. loxP/FRT-survey: PCR tests of cTG and cKO mice to examine the fragment length between loxPs or FRTs with primers designed based on information provided by the Depositor. Confirmation of structure of conditional strains which carry loxP or FRT flanked alleles. Nakata H et al. Genes Cells, 2021
5. Detection of BAC-loxP: A PCR test for BAC-TG to detect loxPs derived from BAC vectors.
6. Genetic background test: PCR tests for the genetic background of inbred and wild-derived strains by using microsatellite or single nucleotide polymorphism (SNP) markers. Test results are posted in the web catalog when tested.

Not performed:

• Sequence analysis of genomic region or mutated gene: Sequencing of transgenes, targeted genes or any other mutated genes of TG, BAC-TG, cTG, KO, KI, CRISPR/Cas9, cKO and spontaneous/ENU-induced mutant strains.
• Analysis of integration site of the transgene on the genome.
• Expression analysis: RT-PCR, Northern hybridization, Western blotting, Detection of reporter genes such as GFP and lacZ.
• Autopsy, histopathology, FACS and other phenotypic analyses requiring special equipment and/or expertise.
• Southern hybridization.
• Karyotyping, FISH and chromosome painting.

Supplemental tests:

• When any other QC tests are performed in supplement, the test results and/or protocols are posted in the web catalog.
• When Not-performed QC tests are requested by users and feasible in our division, the tests can be performed at the users’ expense. The test results and/or protocols are posted in the web catalog.

▼Microbial QC tests:

• Microbial QC tests are performed quarterly by using dirty bedding sentinel mice housed in the same rack where recipient females of embryo transfer or foster mothers are housed. The test results are posted in the web site.
• We aim to eliminate all tested pathogens after rederivation. When any positive test result is obtained in a strain, we notify the recipient of the strain directly and post an alert in the home page.

Strains subject to microbial QC tests*	Classification of pathogens subject to microbial QC test: Performed (◯), Not-performed (—)
	Class A	Class B	Class C	Class D
	Clostridium piliforme (Tyzzer’s organism), Ectromelia virus, Lymphocytic choriomeningitis virus (LCMV), Mouse hepatitis virus (MHV), Mycoplasma pulmonis, Salmonella typhimurium, Sendai virus (HVJ)	Filobacterium rodentium, Citrobacter rodentium, Corynebacterium kutscheri, Dermatophytes, Ectoparasites, Helicobacter bilis, Helicobacter hepaticus, Intestinal protozoa, Pasteurella pneumotropica, Pinworms, Salmonella spp.	Stapylococcus aureus, Pneumocystis murina, Pseudomonas aeruginosa	Lactate dehydrogenase elevating virus (LDHEV), Mouse adenovirus (MAV), Mouse cytomegalovirus (MCMV), Mouse minute virus (MMV), Mouse norovirus (MNV), Mouse parvovirus (MPV), Mouse polyoma virus (Poly), Mouse rotavirus (EDIM), Pneumonia virus of mice (PVM), Reovirus type 3 (Reo 3), Theiler’s mouse encephalomielitis virus (TMEV)
General strain	◯	◯	—	—
Immuno-deficient strain	◯	◯	◯	—

* Strains of highly sensitive to Class C pathogens by defects such as disruption of immune-related genes are designated as immuno-deficient strains and separately handled from general strains with special care for the microbial control. Since some general strains can be sensitive to Class C pathogens depending on housing environments and experimental conditions, it is necessary for a user to consider an appropriate microbial control of such strain with reference to information of the strain.

Performed:
A “◯” mark in the Table indicates that pathogens in the Class are tested by detecting antibody production, culturing and PCR and etc.

Not performed:

• Class C tests for general strains.
• Class D tests.
• Tests for other pathogens not in Class A, B, C or D.
• Tests of a mouse directly from the requested strain.

Supplemental tests:

• When tests of recipient females or foster mothers themselves are requested by users, the tests are performed at user’s expense.
• When tests of mice for distribution are requested by users, the tests are performed at user’s expense.
• When Not-performed QC tests which are requested by users and feasible by using frozen sera and/or organs of sperm donor males, the tests are performed at the users’ expense.
• When Not-performed QC tests are requested by users, the tests are performed at the users’ expense.

All recovered litters are distributed to users.
▼Genetic QC tests

• Not performed.

▼Microbial QC tests

• Microbial QC tests are performed quarterly by using dirty bedding sentinel mice housed in the same rack where recipient females of embryo transfer or foster mothers are housed. The test results are posted in the web catalog.
• We aim to eliminate all tested pathogens after rederivation. When any positive test result is obtained in a strain, we notify the recipient of the strain directly and post an alert in the home page.

Strains subject to microbial QC tests*	Classification of pathogens subject to microbial QC test: Performed (◯), Not-performed (—)
	Class A	Class B	Class C	Class D
	Clostridium piliforme (Tyzzer’s organism), Ectromelia virus, Lymphocytic choriomeningitis virus (LCMV), Mouse hepatitis virus (MHV), Mycoplasma pulmonis, Salmonella typhimurium, Sendai virus (HVJ)	Filobacterium rodentium, Citrobacter rodentium, Corynebacterium kutscheri, Dermatophytes, Ectoparasites, Helicobacter bilis, Helicobacter hepaticus, Intestinal protozoa, Pasteurella pneumotropica, Pinworms, Salmonella spp.	Stapylococcus aureus, Pneumocystis murina, Pseudomonas aeruginosa	Lactate dehydrogenase elevating virus (LDHEV), Mouse adenovirus (MAV), Mouse cytomegalovirus (MCMV), Mouse minute virus (MMV), Mouse norovirus (MNV), Mouse parvovirus (MPV), Mouse polyoma virus (Poly), Mouse rotavirus (EDIM), Pneumonia virus of mice (PVM), Reovirus type 3 (Reo 3), Theiler’s mouse encephalomielitis virus (TMEV)
General strain	◯	◯	—	—
Immuno-deficient strain	◯	◯	◯	—

* Strains of highly sensitive to Class C pathogens by defects such as disruption of immune-related genes are designated as immuno-deficient strains and separately handled from general strains with special care for the microbial control. Since some general strains can be sensitive to Class C pathogens depending on housing environments and experimental conditions, it is necessary for a user to consider an appropriate microbial control of such strain with reference to information of the strain.

Performed:
A “◯” mark in the Table indicates that pathogens in the Class are tested by detecting antibody production, culturing and PCR and etc.Not performed:

• Class C tests for general strains.
• Class D tests.
• Tests for other pathogens not in Class A, B, C or D.
• Tests of a mouse directly from the requested strain.

Supplemental tests:

• When tests of recipient females or foster mothers themselves are requested by users, the tests are performed at user’s expense.
• When tests of mice distribution are requested by users, the tests are performed at user’s expense.
• When Not-performed QC tests are requested by users, the tests are performed at the users’ expense.

All recovered litters including chimeras are distributed to users.
▼Genetic QC tests
Not Performed:

• Karyotyping of ES cells.
• Genotyping and germ-line transmission test are not performed.

▼Microbial QC tests

• Microbial QC tests are performed quarterly by using dirty bedding sentinel mice housed in the same rack where recipient females of embryo transfer or foster mothers are housed. The test results are posted in the web catalog.
• We aim to eliminate all tested pathogens after rederivation. When any positive test result is obtained in a strain, we notify the recipient of the strain directly and post an alert in the home page.

Strains subject to microbial QC tests*	Classification of pathogens subject to microbial QC test: Performed (◯), Not-performed (—)
	Class A	Class B	Class C	Class D
	Clostridium piliforme (Tyzzer’s organism), Ectromelia virus, Lymphocytic choriomeningitis virus (LCMV), Mouse hepatitis virus (MHV), Mycoplasma pulmonis, Salmonella typhimurium, Sendai virus (HVJ)	Filobacterium rodentium, Citrobacter rodentium, Corynebacterium kutscheri, Dermatophytes, Ectoparasites, Helicobacter bilis, Helicobacter hepaticus, Intestinal protozoa, Pasteurella pneumotropica, Pinworms, Salmonella spp.	Stapylococcus aureus, Pneumocystis murina, Pseudomonas aeruginosa	Lactate dehydrogenase elevating virus (LDHEV), Mouse adenovirus (MAV), Mouse cytomegalovirus (MCMV), Mouse minute virus (MMV), Mouse norovirus (MNV), Mouse parvovirus (MPV), Mouse polyoma virus (Poly), Mouse rotavirus (EDIM), Pneumonia virus of mice (PVM), Reovirus type 3 (Reo 3), Theiler’s mouse encephalomielitis virus (TMEV)
General strain	◯	◯	—	—
Immuno-deficient strain	◯	◯	◯	—

* Strains of highly sensitive to Class C pathogens by defects such as disruption of immune-related genes are designated as immuno-deficient strains and separately handled from general strains with special care for the microbial control. Since some general strains can be sensitive to Class C pathogens depending on housing environments and experimental conditions, it is necessary for a user to consider an appropriate microbial control of such strain with reference to information of the strain.

Performed:
A “◯” mark in the Table indicates that pathogens in the Class are tested by detecting antibody production, culturing and PCR and etc.

Not performed:

• Class C tests for general strains.
• Class D tests.
• Tests for other pathogens not in Class A, B, C or D.
• Tests of a mouse directly from the requested strain.

Supplemental tests:

• When tests of recipient females or foster mothers themselves are requested by users, the tests are performed at user’s expense.
• When tests of mice for distribution are requested by users, the tests are performed at user’s expense.
• When Not-performed QC tests are requested by users, the tests are performed at the users’ expense.

1) Cryopreservation of sperm immediately after deposition.
After receiving the first request for distribution:
2) Recovery by in vitro fertilization and embryo transfer.
3) Rederivation into the barrier facility.
4) Colony expansion for distribution and cryopreservation of sperm.
5) Distribution and replenishment of frozen sperm.
6) Closure of the live colony.

1) Breeding deposited mice or their progeny to prepare for cesarean section.
2) Rederivation by caesarian section into the barrier facility.
3) Colony expansion for distribution, cryopreservation of embryos.
4) Distribution and replenishment of frozen embryos.
5) Closure of the live colony.

1) Breeding deposited mice or their progeny to prepare for cesarean section or in vitro fertilization/embryo transfer.
2) Rederivation by caesarean section or embryo transfer into the barrier facility.
3) Colony expansion for distribution and cryopreservation of embryos and sperm.
4) Distribution and replenishment of frozen embryos and sperm.