Abstract
Strains [26] of mice were surveyed by starch gel electrophoresis for genetic variation of 4 liver enzymes; aldehyde dehydrogenase [EC 1.2.1.3], aldehyde oxidase [EC 1.2.3.1], xanthine oxidase [EC 1.2.3.2] and formaldehyde dehydrogenase. A variant of aldehyde dehydrogenase was found in strains ICFE, IS/Cam, NZB, NZW, Simpson and Schneider. A variant of aldehyde oxidase was found in CE. A possible variant of xanthine oxidase was found in SF/Cam. The gene determining the electrophoretic variant of aldehyde oxidase is either the same as, or very closely linked to, the Aox gene which determines aldehyde oxidase activity.