Duplicated zebrafish co-orthologs of parathyroid hormone-related peptide (PTHrP, Pthlh) play different roles in craniofacial skeletogenesis.
Yan YL, Bhattacharya P, He XJ, Ponugoti B, Marquardt B, Layman J, Grunloh M, Postlethwait JH, Rubin DA. J Endocrinol. 2012 Sep; 214(3):421-35. Epub 2012 Jul 3.