Temperature sensitivity of deep orange: Effects on eye pigmentation

Deep orange (dor) affects the amount of both xanthommatin and drosopterins in the eye of D. melanogaster. Our data indicate that for both of these pigments, the amount present in the eye is a temperature-sensitive phenomenon. In addition, while the distribution of the five drosopterins in dor flies is different from that found in wild-type flies, their relative distribution is not affected by temperature. We also present data which suggest that the product of dor is used throughout development.