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.

Ex Input:
 We show in this study , using TCF - 1 beta ( 2 ) - microglobulin double - deficient mice , that these repertoire alterations are not due to Ly - 49 / MHC class I interactions .

Ex Output:
TCF - 1


Ex Input:
 Bone resorption is regulated by the immune system , where T - cell expression of RANKL ( receptor activator of nuclear factor ( NF ) - kappaB ligand ) , a member of the tumour - necrosis factor family that is essential for osteoclastogenesis , may contribute to pathological conditions , such as autoimmune arthritis .

Ex Output:
nuclear factor


Ex Input:
 It was shown that GC receptors in donors ' lymphocytes could be distributed into two different classes similarly to the pattern seen in skin fibroblasts .

Ex Output:

GC receptors