New mutation causing jaundice in mice

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Abstract
A new mutant causing jaundice in mice is reported. Allelism tests indicate that it is not allelic with known hemolytic anemia mutants in mice [hemolytic anemia (sphha), jaundiced (ja), normoblastic anemia (nb), and spherocytosis (sph and sph28e)]. The jaundiced condition appears in young mice at about 24 hours postpartum and is due to a major increase in unconjugated bilirubin in serum compared to normal controls. Adult mutant mice are not jaundiced and bilirubin levels do not differ from normal mice. Adult male mutants have reduced testes size and no viable sperm. Female mutants are fertile but overall maternal performance is reduced as indicated by increased mortality and reduced growth rate of pups. Genetic tests indicate that a single autosomal recessive gene is responsible for the condition. We propose that the mutant be designated hyper-unconjugated bilirubinemia, with the gene symbol hub.

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