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: Both merR genes consist of a 408 bp ORF coding for 135 amino acids .

Output: merR genes

Input: Consider Input: To further study the role of tTG in liver disease , we initiated investigations into the effect of a proinflammatory mediator , tumor necrosis factor ( TNF ) - alpha , on tTG activity in cultured liver cells .

Output: tumor necrosis factor

Input: Consider Input: Transforming growth factor - beta ( TGF - beta ) inhibits cell cycle progression , in part through up - regulation of gene expression of the p21 ( WAF1 / Cip1 ) ( p21 ) cell cycle inhibitor .
Output: TGF - beta