Kir2.1, also known as KCNJ2, is a member of the inwardly rectifying potassium (Kir) channel family. These channels play a crucial role in regulating the resting membrane potential of cells, contributing to various physiological processes, including the regulation of heart rate, neuronal excitability, and smooth muscle contraction. Here are some key points about Kir2.1: 1. **Structure**: Kir2.
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