Fig. 3From: Evolution of neuropeptides in non-pterygote hexapodsSequence logos illustrating the different degrees of conserved sequence motifs in the neuropeptides of non-pterygote hexapods. The genes encoding corazonin, AKH, and ACP likely developed independently from an ancient metazoan gene following gene duplications. Substitutions at amino acid positions indicated with asterisks were found only in collembolan species. X, no amino acid occurring at this positionBack to article page