The function of Ensembl gene identifier ENSG00000134873 (CLDN10, claudin 10) is as follows. Forms paracellular channels: polymerizes in tight junction strands with cation- and anion-selective channels through the strands, conveying epithelial permeability in a process known as paracellular tight junction permeability. {ECO:0000269|PubMed:19383724, ECO:0000269|PubMed:28686597, ECO:0000269|PubMed:35650657, ECO:0000269|PubMed:36008380}. [Isoform 1]: Forms cation-selective paracellular channels. In sweat glands and in the thick ascending limb (TAL) of Henle's loop in kidney, it controls paracellular sodium permeability which is essential for proper sweat production and renal function (PubMed:19383724, PubMed:28686597, PubMed:28771254, PubMed:35650657, PubMed:36008380). {ECO:0000269|PubMed:19383724, ECO:0000269|PubMed:28686597, ECO:0000269|PubMed:28771254, ECO:0000269|PubMed:35650657, ECO:0000269|PubMed:36008380}. [Isoform 2]: Forms anion-selective paracellular channels. In renal proximal tubules, it conveys selective chloride over hydrogencarbonate anion permeability which is required for renal chloride reabsorption and salt homeostasis. {ECO:0000250|UniProtKB:Q9Z0S6, ECO:0000269|PubMed:19383724, ECO:0000269|PubMed:36008380}.