Peptide sequence: NMFQIGKMRY VSVRDFKGKV LIDIREYWMD PEGEMKPGRK GISLNPEQWS Sequence homology: Cow: 100%; Dog: 100%; Human: 100%; Mouse: 100%; Rat: 100%; Yeast: 91%; Zebrafish: 100%. PC4 (activated RNA polymerase II transcription cofactor 4) is a transcript