PTERIDINE pigments were first described by Hopkins1 from the wings of pierid butterflies, and the first chemical characterization of several pteridines from this source was performed by Wieland ...

To visualize iridophores, we removed the pteridine pigments of the overlying xanthophores by fixating the fin in 4% paraformaldehyde–PBS for 1 h at room temperature and washing it in a series of ...