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:  Expression of the granulocyte - macrophage colony - stimulating factor ( GM - CSF ) gene in T cells is activated by the combination of phorbol ester ( phorbol myristate acetate ) and calcium ionophore ( A23187 ) , which mimic antigen stimulation through the T - cell receptor .

A: GM - CSF
****
Q:  Lymphocyte commitment and differentiation are accompanied by programmed gene expression or repression events which are driven by lineage and stage specific transcription factors .

A: transcription factors
****
Q:  Two sequences in the Tip protein were previously shown to be involved in binding to Lck .

A:
Tip protein
****