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Hydrogen ion

Cation of hydrogen with a single proton and no electrons.

Also: H+, Proton

A bare proton; its concentration defines pH. Proton gradients drive ATP synthesis via the chemiosmotic mechanism and nutrient transport via secondary active transporters.

How one textbook covers it

  • Advanced Nutrition and Human Metabolism, 8th ed. (Gropper) — Glossary

    A bare proton; its concentration defines pH. Proton gradients drive ATP synthesis via the chemiosmotic mechanism and nutrient transport via secondary active transporters.

Related terms

Buffer, Chemiosmotic theory