Peptide sequence: EEEQRRAVIV KPVRSCPEAP TSDTASDSEA SDSDAMDQSR EEPSGDGELP Sequence homology: Cow: 86%; Dog: 86%; Guinea Pig: 93%; Horse: 86%; Human: 100%; Mouse: 86%; Rabbit: 86%; Rat: 93%. Transcription factors of the basic helix-loop-helix-zipper(bHLH-Z