Haitina, T., Klovins, J., Takahashi, A., Löwgren, M., Ringholm, A., Enberg, J., Kawauchi, H., Larson, E.T., Fredriksson, R., and Schiöth, H.B. (2007) Functional characterization of two melanocortin (MC) receptors in lamprey showing orthology to the MC1 and MC4 receptor subtypes. BMC Evolutionary Biology. 7:101

Logan, D.W., Bryson-Richardson, R.J., Pagan, K.E., Taylor, M.S., Currie, P.D., and Jackson, I.J. (2003) The structure and evolution of the melanocortin and MCH receptors in fish and mammals. Genomics. 81(2):184-191

Kumar, A., Bhandari, A., Sinha, R., Goyal, P., and Grapputo, A. (2011) Spliceosomal Intron Insertions in Genome Compacted Ray-Finned Fishes as Evident from Phylogeny of MC Receptors, Also Supported by a Few Other GPCRs. PLoS One. 6(8):e22046

Selz, Y., Braasch, I., Hoffmann, C., Schmidt, C., Schultheis, C., Schartl, M., and Volff, J.N. (2007) Evolution of melanocortin receptors in teleost fish: The melanocortin type 1 receptor. Gene. 401(1-2):114-122