This is an NIH subline of C57BL/6. It was separated from C57BL/6J in 1951. Five SNP differences have been identified that distinguish C57BL/6J from C57BL/6ByJ and C57BL/6NJ. This strain does not have the deletion in the Nnt gene that has been found in the C57BL/6J strain (Stock No. 000664).
This strain is homozygous for Crb1rd8, the retinal degeneration 8 mutation. Photoreceptor degeneration is observed in spots, caused by retinal folds and pseudorosettes, found in the fundus of the eye.
This is an NIH subline of C57BL/6. It was separated from C57BL/6J in 1951. 5 SNP differences have been identified that distinguish C57BL/6J from C57BL/6ByJ and C57BL/6NJ. Both C57BL/6ByJ and C57BL/6NJ type as follows: 08-015199792-M (rs3709624) is C; 11-004367508-M (rs3659787) is A; 13-041017317-M (rs3722313) is C; 15-057561875-M (rs3702158) is G; 19-049914266-M (rs3724876) is T. C57BL/6J types as follows: 08-015199792-M is T; 11-004367508-M is G; 13-041017317-M is T; 15-057561875-M is A; 19-049914266-M is G (Petkov and Wiles 2005.) This strain does not have the deletion in the Nnt gene that has been found in the C57BL/6J strain (Stock No. 000664). C57BL/6NJ mice are homozygous for Cyfip2M1N, a spontaneous mutation in the cytoplasmic FMR1 interacting protein 2 that results in an amino acid substitution of phenylalanine for serine at position 968 (S968F). The mutation is found in all C57BL/6N substrains but is not present in the C57BL/6J strain or substrains. The mutation results in 45% lower acute response to cocaine as measured by locomotor hyperactivity.
In 1951 C57BL/6J, then at generation F32, were sent from The Jackson Laboratory to The National Institute of Health where they were maintained via sibling mating for decades. In 1980 this subline reached F126 and in 1984 embryos were cryopreserved at the NIH cryopreservation facility. In approximately 1994 some of these embryos were thawed and maintained via sibling mating and this subline was referred to as B6(e84) to specify that it derived from the embryos frozen in 1984. In September and October of 1997 a new set of embryos were cryopreserved from this thawed line by backcrossing +F6 females to their +F5 fathers. In 2005 some of these embryos frozen in 1997 were sent to The Jackson Laboratory where they were thawed and gave rise to C57BL/6NJ. Thus, C57BL/6NJ is devoid of mutations that may have arisen in any C57BL/6N sublines that remained on the shelf after the 1984 freeze. The embryos received by The Jackson Laboratory were thawed, the colony expanded, and re-frozen immediately. This strain is maintained with frequent replenishment from this frozen stock in order to arrest genetic drift.
|Allele Name||retinal degeneration 8|
|Allele Synonym(s)||Rd8-; nmf144|
|Gene Symbol and Name||Crb1, crumbs family member 1, photoreceptor morphogenesis associated|
|Gene Synonym(s)||7530426H14Rik; 7530426H14Rik; A930008G09Rik; A930008G09Rik; LCA8; RIKEN cDNA 7530426H14 gene; RIKEN cDNA A930008G09 gene; RP12|
|Strain of Origin||C57BL/6J|
|Allele Name||mutation 1, National Institutes of Health|
|Gene Symbol and Name||Cyfip2, cytoplasmic FMR1 interacting protein 2|
|Gene Synonym(s)||1500004I01Rik; 1500004I01Rik; 6430511D02Rik; 6430511D02Rik; AA930218; AU022376; PIR121; Pir121; RIKEN cDNA 1500004I01 gene; RIKEN cDNA 6430511D02 gene; expressed sequence AA930218; expressed sequence AU022376; mKIAA1168|
|Strain of Origin||C57BL/6N|
* Quantities: Volume pricing is automatically applied when a minimum quantity per strain for a shipment is reached
* Genders: Genders of the same strain may be combined to reach minimum quantity levels to receive the volume pricing
Only those orders invoiced to a single billing account and single shipping address for one shipment date qualify for the reduced pricing. Volume pricing cannot be combined with other special pricing offers. Strains, quantities, and volume pricing are subject to change at any time. Orders for retired breeders, pregnant females, mice at specific days of age, or with other special requirements do not qualify for volume pricing. Standing orders are eligible for volume pricing when individual shipments meet all other program criteria.
The average number of mice provided from recovery of our cryopreserved strains is 10. The total number of animals provided,
their gender and genotype will vary. We will fulfill your order by providing at least two pair of mice, at least one animal of
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are needed. Animals typically ship between 10 and 14 weeks from the date of your order. If a second cryorecovery is needed in
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The genotypes of animals provided may not reflect the mating scheme utilized by The Jackson Laboratory prior to cryopreservation, or that discussed in the strain description. Please inquire about possible genotypes which will be recovered for this specific strain. The Jackson Laboratory cannot guarantee the reproductive success of mice shipped to your facility. If the mice are lost after the first three days (post-arrival) or do not produce progeny at your facility, a new order and fee will be necessary.
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