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: Striatal dopamine, dopamine transporter, and vesicular monoamine transporter in chronic cocaine users.

A: vesicular monoamine transporter
****
Q: Impaired expression of the uncoupling protein-3 gene in skeletal muscle during lactation: fibrates and troglitazone reverse lactation-induced downregulation of the uncoupling protein-3 gene.

A: uncoupling protein-3
****
Q: Cloning, sequencing, structural and molecular biological characterization of placental protein 20 (PP20)/human thiamin pyrophosphokinase (hTPK).

A:
placental protein 20
****