On porphyrins in feathers of owls and bustards.
D000818:Animals; D001717:Birds; D003306:Coproporphyrins / Q000032:analysis; D005241:Feathers / Q000032:analysis*; D011166:Porphyrins / Q000032:analysis* / Q000302:isolation & purification; D014578:Uroporphyrins / Q000032:analysis
D003306:Coproporphyrins; D011166:Porphyrins; D014578:Uroporphyrins