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.

[EX Q]:  We have previously described the partial purification of Ap4A hydrolase from S . pombe [ Robinson , de la Pena and Barnes ( 1993 ) Biochim .
[EX A]: Ap4A hydrolase

[EX Q]:  Nonlethal sec71 - 1 and sec72 - 1 mutations eliminate proteins associated with the Sec63p - BiP complex from S . cerevisiae .
[EX A]: sec71 - 1

[EX Q]:  The purified RAG1 protein overexpressed in E . coli exhibited the expected cleavage activity when combined with RAG2 purified from transfected 293T cells .
[EX A]:
RAG1 protein