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:  BMI - 1 and EZH2 Polycomb - group ( PcG ) proteins belong to two distinct protein complexes involved in the regulation of hematopoiesis .

A: BMI - 1
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Q:  Genomic effects are mediated by cytosolic receptors that alter expression of specific genes .

A: cytosolic receptors
****
Q:  We have studied the events underlying cap formation using mice bearing a null mutation in vav ( vav - / - ) , a gene that encodes a guanine - nucleotide exchange factor for the GTPase Rac .

A:
GTPase Rac
****