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.

Q:  The NrfC polypeptide , M ( r ) 24 , 567 , contains 16 cysteine residues arranged in four clusters typical of the CooF super - family of non - haem iron - sulphur proteins .

A: NrfC polypeptide
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Q:  Liver disease and HCV infection after transplantation of organs from hepatitis C antibody positive donors .

A: hepatitis C antibody
****
Q:  Our results show that unlike the case for sos1 , sos2 gene function is dispensable for normal mouse development , growth , and fertility .

A:
sos2 gene
****