Genetics of Ocular NAD+-dependent Alcohol Dehydrogenase and Aldehyde Dehydrogenase in the Mouse: Evidence for Genetic Identity with Stomach Isozymes and Localization of Ahd-4 on Chromosome 11 Near Trembler
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Electrophoretic and activity variation of the stomach and ocular isozyme of aldehyde dehydrogenase (designated AHD-4) was observed between C57BL/6J and SWR/J inbred strains of mice. The phenotypes were inherited in a normal mendelian fashion, with two alleles at a single locus (Ahd-4) showing codominant expression. The alleles assorted independently of those at Adh-3 [encoding the stomach and ocular isozyme of alcohol dehydrogenase (ADH-C2)] on chromosome 3. Three chromosome 11 markers, hemoglobin alpha-chain (Hba), trembler (Tr), and rex (Re), were used in backcross analyses which established that Ahd-4 is closely linked to trembler. The distribution patterns for stomach and ocular AHD-4 phenotypes were examined among SWXL recombinant inbred mice, and those for stomach and ocular ADH-C2 among BXD recombinant inbred strains. The data provided evidence for the genetic identity of stomach and ocular ADH-C2 and of stomach and ocular AHD-4.
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