Parietal cell antigen is now available from the Binding Site, San Diego. Designed for use as a key component in solid-phase ELISA-based assay procedures, the antigen will bind anti-parietal cell antibodies for the H/K-ATPase ?- and ?-subunits after coating onto ELISA plates. Anti-parietal cell antibodies are detected in the serum of 80 to 90% of patients with pernicious anemia, a disease which predominantly affects Caucasians of Northern European descent and is the most common cause of vitamin B12 deficiency in Western countries. Derived and sourced from porcine gastric mucosa, the antigen demonstrates a product purity level in excess of 90% as assessed by SDS gel electrophoresis. It is offered in operator-oriented fill formats of 1.0 mg and 0.2 mg vials, with customer-specific and bulk packaging configurations also available. For more information, visit the Binding Site.