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

[EX Q]:  Ikaros is a unique regulator of lymphopoiesis that associates with pericentromeric heterochromatin and has been implicated in heritable gene inactivation .
[EX A]: pericentromeric heterochromatin

[EX Q]:  In cytosolic fractions prepared from rat thymic lymphocytes , [ 3H ] - dexamethasone - 21 - mesylate labels a protein ( Mr approximately equal to 95 , 000 ) which was identified as the glucocorticoid receptor by the following criteria : ( a ) labeling of this moiety is inhibited by treatment with a 100 - fold molar excess of glucocorticoids , such as dexamethasone and triamcinolone acetonide ; and ( b ) the covalently labeled Mr approximately equal to 95 , 000 protein is activated ( by heating at 20 degrees for 30 min ) to a form that binds to DNA - cellulose .
[EX A]:
glucocorticoid receptor