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.

[Q]:  HNF4alpha7 mRNA is also found in totipotent embryonic stem cells .
[A]: HNF4alpha7 mRNA


[Q]:  In addition , putative binding sites for SH3 and SH2 domains are present in the amino - terminal half of the molecule .
[A]: SH2 domains


[Q]:  A genomic clone of the chicken osteopontin - encoding gene ( opn ) was isolated and found to be organized as follows : an untranslated 5 ' exon ; a signal peptide ; a recognition sequence for phosphorylation by casein kinase II ; a domain containing a possible O - linkage site for glycosylation ; a second casein kinase II phosphorylation site ; an exon containing three functional regions , the poly - Asp sequence of seven consecutive Asp residues , the RGD integrin recognition site and a potential N - linkage site for glycosylation ; and a large C - terminal exon which also contains a potential N - linkage site for glycosylation .
[A]:
casein kinase II