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.

Beta 2- but not beta 1-adrenoceptors are involved in desipramine enhancement of aggressive behavior in long-term isolated mice.
beta 1-adrenoceptors

Synergistic enhancement of cancer therapy using a combination of heat shock protein targeted HPMA copolymer-drug conjugates and gold nanorod induced hyperthermia.
heat shock protein

Mifepristone alters expression of endometrial steroid receptors and their cofactors in new users of medroxyprogesterone acetate.

steroid receptors