has primary input monoatomic ion channel activity monoatomic cation channel activity https://github.com/geneontology/go-ontology/issues/24479 cation channel activity GO:0005261 Reactome:R-HSA-9754616 Reactome:R-HSA-4420052 Reactome:R-HSA-2089943 Enables the energy-independent facilitated diffusion of a monoatomic cation through a transmembrane aqueous pore or channel. non-selective cation channel activity molecular_function Reactome:R-HSA-9712190 Reactome:R-HSA-9837835 cation diffusion facilitator activity Reactome:R-HSA-1168376 Reactome:R-HSA-426223 Reactome:R-HSA-9706720 Reactome:R-HSA-169683 Reactome:R-HSA-1296043 monoatomic cation transmembrane transporter activity channel activity