Abstract
Pteridine developmental patterns found in two-dimensional chromatograms prepared from adult, claret-eyed (ca and candhomozygotes and cand/ca heterozygotes) and wild-type Drosophila melanogaster were compared, and a metabolic block affecting the conversion of biopterin to drosopterin was tentatively identified. All three mutant types appeared identical in their pteridine inventories, thus providing no support for a supposed cause-effect relationship between abnormal pteridine metabolism and aberrant behaviour of chromosomes in cand.
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