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Simes DC, Williamson MK, Ortiz-Delgado JB, Viegas CSB, Price PA, M. Cancela L. Purification of matrix Gla protein from a marine teleost fish, Argyrosomus regius: calcified cartilage and not bone as the primary site of MGP accumulation in fish. J Bone Miner Res. 2003;18(2):244-59. doi:10.1359/jbmr.2003.18.2.244

Simes DC, Williamson MK, Schaff BJ, et al. Characterization of osteocalcin (BGP) and matrix Gla protein (MGP) fish specific antibodies: validation for immunodetection studies in lower vertebrates. Calcif Tissue Int. 2004;74(2):170-80. doi:10.1007/s00223-003-0079-4