Characterization of the prolactin (PRL) amino acid (aa) or cDNA sequences has not been reported for any member of the Felidae family. We cloned cat growth hormone (cGH) and cat PRL (cPRL) cDNA sequences from a feline pituitary cDNA library. High homology between species allowed bovine PRL(bPRL) and bGH cDNA clones to be used to identify clones encoding the 229-aa cPRL and 216-aa cGH sequences. The cGH protein is most homologous to pig and dog GH. Similarly, cPRL shares the most aa identity to pig PRL (pPRL). Northern blot analysis revealed the mRNA size for cGH and cPRL to be approx. 1 and 1.1 kb, respectively. These results reveal that GH and PRL from the Felidae family are highly conserved to other families of GH and PRL.
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