SLC20A2 and primary biliary cholangitis: In this study, a novel heterozygous nonsense variant, c.1669C > T [p.(Gln557*)], in the solute carrier family 20 member 2 gene (SLC20A2), encoding type III sodium-dependent inorganic phosphate transporter 2 (PiT2), was identified in a Han-Chinese family with PBC using whole exome sequencing and Sanger sequencing.