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.

Example Input:  MATERIALS AND METHODS : We screened a panel of acute myeloid leukemia - derived cell lines for TNF - alpha - responsiveness .
Example Output: TNF - alpha

Example Input:  Among six or so PKC isoforms expressed in T cells , only PKCtheta participates in the assembly of the supramolecular activation clusters at the contact site of the TCR with Ag .
Example Output: PKC isoforms

Example Input:  Rel family proteins regulate the expression of genes linked to kappa B - binding motifs .
Example Output:
Rel family proteins