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:  It has been shown in vitro that dissociation of I kappa B alpha from these complexes results in active NF - kappa B .

A: I kappa B
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Q:  Expression of oestrogen and progesterone receptors by mast cells alone , but not lymphocytes , macrophages or other immune cells in human upper airways .

A: progesterone receptors
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Q:  BAP / TFII - I , a protein implicated in transcriptional regulation , is associated with Btk in B cells and is transiently phosphorylated on tyrosine following B cell receptor engagement .

A:
B cell receptor
****