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.

Let me give you an example: Sox - 4 is important for very early B - cell differentiation , while TCF - 1 / LEF - 1 play a crucial role in early thymocyte development 
The answer to this example can be: TCF - 1
Here is why: The gene, TCF - 1 has been tagged as protein since it plays a crucial role in early thymocyte development.

OK. solve this:
 The lack of a change in lymphocyte glucocorticoid receptor concentration in the presence of cortisol excess suggests the possibility that hypercortisolemia in depressive illness represents a state of peripheral glucocorticoid resistance .
Answer:
glucocorticoid receptor