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: Increased Cat3-mediated cationic amino acid transport functionally compensates in Cat1 knockout cell lines.

A: Cat1
****
Q: Synthesis of quinoline derivatives: discovery of a potent and selective phosphodiesterase 5 inhibitor for the treatment of Alzheimer's disease.

A: phosphodiesterase 5
****
Q: Electrical Stimuli Release ATP to Increase GLUT4 Translocation and Glucose Uptake via PI3Kγ-Akt-AS160 in Skeletal Muscle Cells.

A:
GLUT4
****