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.

 To determine the presence and potential role of BCL - 6 mutations in cHD , the 5 ' - noncoding BCL - 6 proportion of single Hodgkin and Reed - Sternberg ( HRS ) cells from 6 cases of cHD and 6 cases of HD - derived cell lines was analyzed .
BCL - 6

 EBV utilizes CD21 / CR2 as its receptor on B cells to initiate the infection process .
CD21 / CR2

 We have previously reported that BMP - 2 inhibited the growth of HS - 72 mouse hybridoma cells by inducing p21 ( CIP1 / WAF1 ) expression .

BMP - 2

