Peptide sequence: PSVQPIVKLV STATTAPPST APSGPGSVQK YIVVSLPPTG EGKGGPTSHP Sequence homology: Cow: 93%; Dog: 100%; Guinea Pig: 86%; Horse: 100%; Human: 100%; Mouse: 93%; Rabbit: 93%; Rat: 93%. Initiation of transcription by RNA polymerase II requires the a