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.

 Inhibition of CD28 / CD3 - mediated costimulation of naive and memory human T lymphocytes by intracellular incorporation of polyclonal antibodies specific for the activator protein - 1 transcriptional complex .
polyclonal antibodies

 Maturation of DP cortical thymocytes to single - positive ( CD4 ( + ) / CD8 ( - ) or CD8 ( + ) / CD4 ( - ) ) medullar thymocytes correlated with decreased detectability of EZH2 and continued relative absence of BMI - 1 .
BMI - 1

 Recent studies have increasingly implicated the proteasome in the regulation of cell surface receptors .

cell surface receptors