Peptide sequence: SFNSCLDPVM YFLMSSNIRK IMCQLLFRRF QGEPSRSEST SEFKPGYSLH Sequence homology: Cow: 93%; Dog: 93%; Guinea Pig: 93%; Horse: 93%; Human: 100%; Mouse: 86%; Rabbit: 93%; Rat: 79%. G protein-coupled receptors (GPCRs), such as GPR34, are integral