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.

Input: Consider Input:  No alterations of thymocyte subpopulations were seen , suggesting that changes in the percentage of CD4 + CD8 + thymocytes after administration of androgens depend on the presence of functional androgen receptors .

Output: androgen receptors


Input: Consider Input:  This suggests the association of E2 - receptor expression with control of growth rather than cell maturation .

Output: E2 - receptor


Input: Consider Input:  Identification of glucocorticoid receptors in monocytes and macrophages .


Output: glucocorticoid receptors