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.

Example Input: However , most effector CD8 + T cells recovered after exposure to Ag do not produce sufficient IL - 2 to sustain growth , and depend on CD4 + T helper cells for this obligate growth factor .
Example Output: IL - 2

Example Input: Therefore , upon in vivo androgen treatment , other cells containing androgen receptors than thymocytes are probably involved in inducing the increase in thymic apoptosis .
Example Output: androgen receptors

Example Input: Since the effect of cortisol was additive to that of PgE2 and was not changed by phosphodiesterase inhibitors , it is conceivable that the hormone acts at a level different from the adenylate cyclase - phosphodiesterase system .
Example Output:
adenylate cyclase