Proton buffering

**Proton buffering** refers to the collective set of chemical processes and molecules that resist changes in hydrogen ion concentration (pH) within biological systems. It is not a single molecule, protein, enzyme, receptor, or druggable target but rather describes the action of various buffer systems—such as the bicarbonate buffer system in blood plasma, phosphate buffers inside cells, and protein buffers like hemoglobin—that maintain physiological pH within narrow limits essential for life[1][3][4][6]. These buffers work by reversibly binding protons when acids are added or releasing protons when bases are introduced[5][6]. The concept is fundamental to physiology but does not correspond to an individual molecular entity suitable for direct pharmacological targeting.\n\n**Note:** "Proton buffering" is not itself a canonical therapeutic target. It describes an essential biochemical property shared by many molecules and systems. If you require structured information on specific components involved in proton buffering—such as "Bicarbonate transporter," "Carbonic anhydrase," or "Hemoglobin"—those would be appropriate targets with defined molecular identities[1][3].

Other names

BufferingBuffer systemspH bufferingAcid-base buffering