You will be given a definition of a task first, then some input of the task.
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.

The resistance to cytolethal effects can not be ascribed to a failure of cells to take up and bind steroid or to significant differences in the molecular species of cytoplasmic receptors present .
Output:
cytoplasmic receptors