Anti-MBL antibodies enable researchers to detect and measure the MBL antigen in biological samples. This target is a reported synonym of the MBL2 gene, which encodes mannose binding lectin 2. This protein is known to function in innate immune responses, among other biological roles. The human version of MBL has a canonical amino acid length of 248 residues and a protein mass of 26.1 kilodaltons. It is reported to be a secreted protein that is notably expressed in the liver. Other names for this target antigen include COLEC1 and HSMBPC.