Drosophila \"elastin-type\" gene identified with antibody to Bombyx PTTH

Screening of two Drosophila nervous system cDNA libraries with DNA probes derived from lepidopteran prothoracicotropin (PTTH) did not yield any hybridizing clone. Monoclonal antibody to Bombyx PITH recognized in the expression cDNA library several clones but their sequencing revealed relationship to elastins and collagens rather than to PTTH. We conclude that Drosophila PTTH cannot be identified with probes derived from lepidopteran PTTH.