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:  Amniotic fluid ionic concentration in response to chronic fetal vasopressin infusion .

Output: fetal vasopressin


Input: Consider Input:  Although polyubiquitin chains linked through Lys ( 29 ) of ubiquitin have been implicated in the targeting of certain substrates to proteasomes , the signaling properties of these chains are poorly understood .

Output: polyubiquitin chains


Input: Consider Input:  We now show that purified recombinant c - sis / PDGF can induce this binding activity which we have termed SIF , for sis - inducible factor .


Output: c - sis