Provided below are ELISA kits targeting solute carrier family 35 member B4, a human protein encoded by SLC35B4. This protein is 331 amino acids long, with a mass of 37.4 kDa, and is a member of the Nucleotide-sugar transporter family, SLC35B subfamily. 3 isoforms have been identified. Other alias names for this protein include: UDP-xylose and UDP-N-acetylglucosamine transporter, UDP-Xylose/N-Acetylglucosamine transporter, YEA4 homolog, solute carrier family 35 (UDP-xylose/UDP-N-acetylglucosamine transporter) member B4, and UDP-Xylose/N-Acetylglucosamine transporter.