instruction:
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.
question:
 We describe a novel and potentially important mechanism of nitric oxide signaling - through direct activation of guanine nucleotide - binding proteins ( G proteins ) .
answer:
G proteins


question:
 To examine the effect of glucocorticoid deficiency on the glucocorticoid receptor , we examine the binding of [ 3H ] dexamethasone to lymphocytes in normal subjects and patients with adrenal insufficiency before and after glucocorticoid replacement therapy .
answer:
glucocorticoid receptor


question:
 Furthermore , in immunized mice , OBF - 1 protein amounts are dramatically increased in primary activated B cells , without concomitant increase in OBF - 1 mRNA .
answer:

OBF - 1