Alignments of vertebrate IGF2 E peptides.
A, amino acid sequences of the IGF2 C-terminal E peptide in eight terrestrial vertebrates in single-letter code. Differences are shown, and identities are depicted by dots, and a dash indicates no residue. B, amino acid sequences of the C-terminal E peptide in 12 fish species in single-letter code. Differences are shown, and identities are depicted by dots, and a dash indicates no residue. No E peptide has been defined for lamprey (= none). A and B, dashes have been placed to maximize alignments.