Peptide sequence: HHHLVRKTDA VYDPAEYDKH PERYISRFNT DIAPYTTCLI NGIYWEQNTP Sequence homology: Cow: 86%; Dog: 86%; Guinea Pig: 86%; Horse: 79%; Human: 100%; Rabbit: 86%; Rat: 86%. AASS is a bifunctional enzyme that catalyzes the first two steps in the mamma