adenosine triphosphate alpha helix amino acid aquaporin bk channel base pair clcnka clcnkb calcium-activated potassium channel calcium channel cation channels of sperm cell membrane chloride chloride channel congenital absence of the vas deferens cyclic nucleotide-gated ion channel cystic fibrosis cytoskeleton digestive digital object identifier ensembl entrez epithelial sodium channel funny current g protein-coupled inwardly-rectifying potassium channel general bacterial porin family glycoprotein homologene human inositol triphosphate receptor inward-rectifier potassium ion channel ion ion channel l-type calcium channel ligand-gated ion channel liver lung membrane transport protein mouse genome informatics mucus mutation n-type calcium channel osmosis p-type calcium channel pancreas phenylalanine potassium channel protein protein data bank protein folding q-type calcium channel r-type calcium channel ryanodine receptor sk channel shaker gene skin sodium channel stretch-activated ion channel sweat gland sweat test t-type calcium channel trpc trpm trpml trpp trpv tandem pore domain potassium channel transient receptor potential channel two-pore channel vas deferens voltage-dependent anion channel voltage-dependent calcium channel voltage-gated ion channel voltage-gated potassium channel