Cation

Cations are positively charged ions, formed when an atom or molecule loses one or more electrons, resulting in fewer electrons than protons[1][3][5][8]. They can be monatomic (e.g., Na^+, K^+, Ca^2+) or polyatomic (e.g., NH_4^+)[1]. Cations play critical roles in biology, chemistry, and physics: they help stabilize negatively charged biological macromolecules (proteins, DNA, RNA), regulate cell membrane potentials, facilitate signal transduction in neurons, and drive chemical reactions[2][6][8][9]. Specific examples of biologically essential cations include sodium ions, potassium ions, calcium ions, magnesium ions, iron ions, and zinc ions[2][6]. In living systems, cation concentrations are tightly controlled by proteins such as ion channels and transporters[2][6]. Dysregulation of particular cations is associated with disease but “positively charged ions” as a general class is not considered a druggable biological target—pharmacology instead focuses on the proteins that regulate or transport specific cations. If structured information is desired, specify a particular cation (e.g. “Sodium ion channel protein type 5”) or the protein/receptor through which it acts. As written, "Positively charged ions" is not a precise or actionable target.

Other names

CationsPositively charged ion