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]: Recent studies have increasingly implicated the proteasome in the regulation of cell surface receptors .
[A]: cell surface receptors

[Q]: Stimulation of T lymphocytes results in a rapid increase in intracellular calcium concentration ( [ Ca2 + ] i ) that parallels the activation of Ca2 + - calmodulin - dependent protein kinase IV ( CaMKIV ) , a nuclear enzyme that can phosphorylate and activate the cyclic adenosine monophosphate ( cAMP ) response element - binding protein ( CREB ) .
[A]: nuclear enzyme

[Q]: Using a luciferase reporter assay , we demonstrated that v - src overexpression in NIH3T3 induced STAT3 - dependent transcriptional activity from the mcl - 1 promoter and increased endogenous Mcl - 1 protein levels .
[A]:
Mcl - 1