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: Pharmacogenomics of gemcitabine metabolism: functional analysis of genetic variants in cytidine deaminase and deoxycytidine kinase.

A: cytidine deaminase
****
Q: Clinical assessment of norepinephrine transporter blockade through biochemical and pharmacological profiles.

A: norepinephrine transporter
****
Q: Design, synthesis and structure-activity relationship of new arginine vasopressin analogues containing proline derivatives in position 2.

A:
arginine vasopressin
****