The developmental analysis of aldehyde oxidase activity in cin allelic heterozygotes of Drosophila melanogaster.

Aldehyde oxidase (AO) activity has been determined at 11 stages during the development of selected cin allelic homo-, hemi- and heterozygotes in Drosophila melanogaster. The AO activity levels found during development were completely consistent with the levels previously reported for adults, less than 24 h of age (Bentley and Williamson, 1979b). All of the cin homo- and hemizygotes tested exhibited no significant levels of AO activity at any of the 11 stages during development. All cin allelic heterozygotes, which were defined as complementing in adults, less then 24h of age, displayed similar levels of complementation at all stages tested. Conversely, all cin allelic heterozygotes which were defined as noncomplementing in adults, less than 24h of age, were found to lack measurable AO activity at all developmental stages tested.