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.

Novel locus including FGF21 is associated with dietary macronutrient intake.
FGF21

Metformin and phenformin activate AMP-activated protein kinase in the heart by increasing cytosolic AMP concentration.
AMP-activated protein kinase

Multifunctional targets of dietary polyphenols in disease: a case for the chemokine network and energy metabolism.

chemokine