Peptide sequence: VRTKTWTLKK HFVGYPTNSD FELKTSELPP LKNGEVLLEA LFLTVDPYMR Sequence homology: Cow: 93%; Guinea Pig: 83%; Horse: 83%; Human: 93%; Rabbit: 83%; Rat: 79%. PTGR1 encodes an enzyme that is involved in the inactivation of the chemotactic factor,