Peptide sequence: QRKKCQKGER GKKGRERKRK KPNKGESKEA IPDSKSLESS KEIPEQRENK Sequence homology: Cow: 92%; Dog: 100%; Guinea Pig: 100%; Horse: 100%; Human: 100%; Mouse: 100%; Rabbit: 100%; Rat: 100%. RSPO3 is a member of the R-spondin family and plays a role