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:
 Antibodies specific to the different members of the Jun and Fos family of transcription factors show that , in gel retardation assays , a Jun - like factor is a component of the H3 . 2 specific complex .

Ex Output:
Fos family


Ex Input:
 The strongly DNA binding p50 subunit showed only very weak , if any , induction of gene expression .

Ex Output:
p50 subunit


Ex Input:
 The cloned rRNA operon was transcribed in vitro by using purified RNA polymerase of Escherichia coli .

Ex Output:

RNA polymerase