| First Author | Kernek KL | Year | 2006 |
| Journal | Behav Genet | Volume | 36 |
| Issue | 2 | Pages | 301-8 |
| PubMed ID | 16408247 | Mgi Jnum | J:124736 |
| Mgi Id | MGI:3722483 | Doi | 10.1007/s10519-005-9032-9 |
| Citation | Kernek KL, et al. (2006) A single copy of carbonic anhydrase 2 restores wild-type circadian period to carbonic anhydrase II-deficient mice. Behav Genet 36(2):301-8 |
| abstractText | Carbonic anhydrase II (CA-II)-deficient mice have long circadian periods compared to their siblings with normal CA-II levels. The CA-II-deficient mice differ genetically from their siblings at proximal chromosome three, where the mutated carbonic anhydrase 2 gene sits on a small insert of DNA from the DBA/2J strain. The rest of the genome is that of the C57BL/6J strain. The goal of this study was to test the hypothesis that the null mutation in carbonic anhydrase 2 and the long circadian period phenotype were linked. In order to separate the effect of the null mutation in carbonic anhydrase 2 from the effect of DBA/2J alleles of other genes on the insert, two new lines of mice were studied. The first line, Kar, was developed from a CA-II-deficient mouse that had a fortuitous recombination restoring functional CA-II without affecting the rest of the DBA/2J insert. The second line was generated by breeding DBA/2J mice and C57BL/6J mice until they had the genomic composition of CA-II-deficient mice without the null mutation. Both lines of mice had circadian periods not different from C57BL/6J mice and shorter than CA-II-deficient mice. The phenotype of the new lines showed that the long circadian period characteristic of the CA-II-deficient mice arises when functional CA-II is absent, not when DBA/2J alleles are present on proximal chromosome three. |
