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


question:
Comparison of captopril and enalapril to study the role of the sulfhydryl-group in improvement of endothelial dysfunction with ACE inhibitors in high dieted methionine mice.
answer:
ACE


question:
Bevantolol: a beta-1 adrenoceptor antagonist with unique additional actions.
answer:

beta-1 adrenoceptor