Evolution of gnathostome prodynorphin and proenkephalin: Characterization of a shark proenkephalin and prodynorphin cDNAs. General and Comparative Endocrinology, 177(3), 353–364
DOI: 10.1016/j.ygcen.2011.12.016
Presence of the δ-MSH sequence in a proopiomelanocortin cDNA cloned from the pituitary of the galeoid shark, Heterodontus portusjacksoni. General and Comparative Endocrinology, 133(1), 71–79
DOI: 10.1016/S0016-6480(03)00151-5