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:
 The action of these hormones possibly involves the synthesis of an inhibitory protein ( s ) , since the presence of cycloheximide during the incubation with Dx prevented the inhibition of DNA synthesis .
answer:
inhibitory protein


question:
 A number of physiological and synthetic progestins were tested for their ability to compete with [ 3H ] dexamethasone for the binding to the glucocorticoid receptor of human mononuclear leukocytes and their ability to elicit glucocorticoid - like effects on the same cells .
answer:
glucocorticoid receptor


question:
 We have designed a Nef protein that is readily expressed in T - cell lines and whose function is inducibly activated .
answer:

Nef protein