Anti-MBP1 antibodies enable researchers to detect and measure the MBP1 antigen in biological samples. This target is a reported synonym of the EFEMP2 gene, which encodes EGF containing fibulin extracellular matrix protein 2. This protein is reported to play a crucial role in elastic fiber formation in tissue, and in the formation of ultrastructural connections between elastic laminae and smooth muscle cells in the aorta, therefore participates in terminal differentiation and maturation of smooth muscle cell (SMC) and in the mechanical properties and wall integrity maintenance of the aorta. The human version of MBP1 has a canonical amino acid length of 443 residues and a protein mass of 49.4 kilodaltons. It is reported to be localized in the extracellular matrix and is secreted of cells and notably expressed in the testis. MBP1 is a member of the Fibulin protein family.