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: The non - major histocompatibility complex ( MHC ) - encoded CD1 family has recently emerged as a new antigen - presenting system that is distinct from either MHC class I or class II molecules .
Example Output: CD1 family

Example Input: Two genes ( ptsI and ptsA ) that encode homologues of the energy coupling Enzyme I of the phosphoenolpyruvate - dependent sugar - transporting phosphotransferase system ( PTS ) have previously been identified on the Escherichia coli chromosome .
Example Output: Enzyme I

Example Input: The goals of these experiments were to determine whether lactational anestrus would be prolonged by a 48 - h fast at days 13 and 14 postpartum ( pp ) and , if so , to determine whether this effect could be reversed by treatment with the Ob protein leptin .
Example Output:
Ob protein