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:  In contrast , the binding of [ 3H ] DEX to C7 cytosol revealed a single class of binding sites ( Kd = 1 . 9 nM ; receptor concentration , 0 . 46 pmol / mg protein ) .

A: binding sites
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Q:  T - cell - mediated regulation of osteoclastogenesis by signalling cross - talk between RANKL and IFN - gamma .

A: IFN - gamma
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Q:  IL - 2 production and intracellular accumulation in nonscraped PB - T cells activated with CD28 / CD3 coligation were skewed favoring CD45RO + and CD4 + subsets , as was IL - 2 production in scraped PB - T cells .

A:
IL - 2
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