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.

 No evidence for the existence of a specific progesterone receptor in human mononuclear leukocytes was obtained as judged by the results of competition experiments where a progesterone receptor - specific ligand [ 3H ] Org 2058 was used .
progesterone receptor

 Previously described enhancement of in vitro transcription that was only seen with nuclear extracts derived from B - cell neoplasms corresponding to the late stages of B - cell differentiation was shown to be dependent on the actions of these factor ( s ) on the DNA region within the V kappa gene promoter .
V kappa

 Genomic effects are mediated by cytosolic receptors that alter expression of specific genes .

cytosolic receptors