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.

 Paraffin - embedded tissues from 23 cutaneous lesions and a single lymph node biopsy from patients diagnosed with MF were evaluated for p65 ( Rel A ) expression by using a monoclonal mouse antibody that detects the activated form of p65 ( Rel A ) .
monoclonal mouse antibody