channel activity narrow pore channel activity Enables the transport of a solute across a membrane via a narrow pore channel that may be gated or ungated. Reactome:R-HSA-1855190 Reactome:R-HSA-1855161 Reactome:R-HSA-1855173 Reactome:R-HSA-1855220 Reactome:R-HSA-1855188 Reactome:R-HSA-1855168 Reactome:R-HSA-1855212 Reactome:R-HSA-1855201 molecular_function Reactome:R-HSA-1855203 GO:0022842