SNPU
The abbreviation SNPU is most commonly associated with the Sodium Pump Unit, a measurement unit used in biochemistry and physiology to quantify the activity of the plasma membrane sodium‑potassium ATPase (Na⁺/K⁺‑ATPase). The Na⁺/K⁺‑ATPase is a transmembrane enzyme responsible for maintaining the electrochemical gradients of sodium and potassium ions across cellular membranes, a function essential to processes such as neuronal signaling, muscle contraction, and osmotic balance.
The Sodium Pump Unit expresses the rate of ATP consumption by the enzyme per unit area of
Historically, the concept of the Sodium Pump Unit emerged in the 1970s as part of efforts to