Anti-LRG1 antibodies are used in the immunodetection of the protein leucine rich alpha-2-glycoprotein 1. In humans, the canonical protein has a reported length of 347 amino acid residues and a mass of 38.2 kDa. It is known to be a secreted protein. It is notably expressed in plasma. Among its functions, LRG1 is involved with brown fat cell differentiation and the regulation of angiogenesis. Post-translational modifications have been described, including glycosylation. Synonyms for this target antigen include 1300008B03Rik, 2310031E04Rik, leucine rich alpha 2 glycoprotein, and leucine-rich alpha-2-glycoprotein.