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.

Breast cancer patients showed significant responses to MuMTV ( 49 % and to MCF - 7 ( 50 % ) , but not to MPMV ( 29 % ) .
MCF - 7

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

Congenital immunodeficiencies associated with absence of HLA class II antigens on lymphocytes result from distinct mutations in trans - acting factors .
class II antigens