Peptide sequence: RVENLQAVQT DFSSDPLQKV VCFNHDNTLL ATGGTDGYVR VWKVPSLEKV Sequence homology: Cow: 83%; Dog: 92%; Guinea Pig: 91%; Horse: 100%; Human: 100%; Mouse: 83%; Pig: 100%; Rabbit: 100%; Rat: 100%. Prolactin (PRL) expression in the pituitary is limi