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:  Reactivity with the tegument protein encoded by UL21 was identified for an additional patient .

A: tegument protein
****
Q:  Evidence for a steroid receptor in rheumatoid synovial tissue cells .

A: steroid receptor
****
Q:  Gel shift analysis , using extracts of B cells in latency or induced into the lytic cycle , identified Sp1 and Sp3 as the predominant cellular proteins bound to Rp near - 45 .

A:
cellular proteins
****