In this task, you are given a sentence. You are expected to recognize the name of gene or protein. Although there might be several correct answers, you need to write one of them.

 These findings also demonstrate that unless excluded by other factors , the C proteins are likely to be located along the length of nascent transcripts .
C proteins

 Mammalian homologues of the Polycomb - group gene Enhancer of zeste mediate gene silencing in Drosophila heterochromatin and at S . cerevisiae telomeres .
Enhancer of zeste

 A survey of children with HBsAg markers related to their parents HBV markers .

HBsAg markers