at least three eye pigments ( drosopterin , isodrosopterin , and aurodrosopterin ) are synthesized when pda and 2-amino-4-oxo- ( d-erythro-1',2',3'-trihydroxypropyl ) -7.8-dihydropteridine triphosphate ( dihydroneopterin triphosphate ) are incubated with mg2+ and protein fractions prepared from drosophila heads .
C0015392
eye
C0018670
heads