title: Structure and colour-production of the blue barbs of Agapornis roseicollis and Cotinga maynana.
mesh_terms: D000818:Animals; D001717:Birds; D002467:Cell Nucleus; D003116:Color; D005241:Feathers / Q000032:analysis / Q000166:cytology*; D006651:Histocytochemistry; D007633:Keratins / Q000032:analysis; D008027:Light; D008854:Microscopy, Electron; D008855:Microscopy, Electron, Scanning; D013053:Spectrophotometry
chemical_list: D007633:Keratins