Anti-gxk1 antibodies enable researchers to detect and measure the gxk1 antigen in biological samples. This target is a reported synonym of the FAM20B gene, which encodes FAM20B glycosaminoglycan xylosylkinase. This protein is known to function in protein phosphorylation, among other biological roles. The human version of gxk1 has a canonical amino acid length of 409 residues and a protein mass of 46.4 kilodaltons. It is reported to be localized in the Golgi of cells and widely expressed in many tissue types. gxk1 is a member of the FAM20 protein family.