Peptide sequence: VGHTVRHEYT VIGQKVNLAA RMMMYYPGIV TCDSVTYNGS NLPAYFFKEL Sequence homology: Cow: 93%; Dog: 93%; Guinea Pig: 93%; Horse: 93%; Human: 100%; Mouse: 100%; Rabbit: 100%; Rat: 100%. SAC belongs to a distinct class of mammalian adenylyl cyclase