The GAB ELISA kits listed below are analytical tools for measuring concentrations of GAB in various samples. GAB is an alternative name for the human A1BG gene, which encodes the protein, alpha-1-B glycoprotein. Structurally, the A1BG protein is 495 amino acid residues in length and 54.3 kilodaltons in mass. However, as many as 2 protein isoforms have been identified. It is known to be a secreted protein. In terms of tissue specificity, it is notably expressed in plasma. This protein is known to be glycosylated. Other names for this target antigen include A1B and ABG.