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.

Bioimaging real-time PXR-dependent mdr1a gene regulation in mdr1a.fLUC reporter mice.
mdr1a

Epithelioid gastrointestinal stromal tumor with PDGFRA activating mutation and immunoreactivity.
PDGFRA

Retigabine, a novel anti-convulsant, enhances activation of KCNQ2/Q3 potassium channels.

KCNQ2/Q3

