The ELISA kits listed below target ENPP1, the symbol for the human gene, ectonucleotide pyrophosphatase/phosphodiesterase 1, and a member of the Nucleotide pyrophosphatase/phosphodiesterase family. The protein has an enzyme classification of phosphodiesterase I. The protein encoded by ENPP1 has a predicted amino acid length of 925, a mass of 104.9 kDa, and a membrane and secreted subcellular localization. Glycosylation has been reported. Pathologic involvement is reported in Ossification of the posterior longitudinal ligament of the spine. ENPP1 may also be known by the following names: plasma-cell membrane glycoprotein 1, phosphodiesterase I/nucleotide pyrophosphatase 1, alkaline phosphodiesterase 1, Ly-41 antigen, E-NPP 1, and ARHR2. Orthologs of the gene, including human, mouse, rat, and plant are available targets of several ELISA kits.