Glycan Binding Proteins

M-Ficolin (Ficolin-1) is a non-serum protein that is expressed in leukocytes and lung. M-Ficolin precipitates with mannose-binding lectin (MBL)-associated serine proteases (MASP)-1 and MASP-2, indicating that M-Ficolin forms complexes with MASP-1 and MASP-2, recognizes certain types of bacteria and subsequently activates the lectin pathway. This antibody reacts with M-Ficolin.

L-Ficolin (Ficolin-2) is an innate immunity pattern recognition molecule found in human serum. L-Ficolin binds to distinct pathogen-associated molecular patterns (PAMP), such as carbohydrates (GlcNAc), lipoteichoic acid and acetylated groups thereby facilitating phagocytosis and activation of complement through the lectin route using the same serine proteases as mannose-binding lectin (MBL) named MASP ((MBL)-associated serine protease). This antibody reacts specifically with L-Ficolin. No cross reactivity is seen with M-Ficolin (Ficolin-1) and H-Ficolin (Ficolin-3).

CD31 (PECAM1) is a member of the immunoglobulin (Ig) superfamily that is expressed on the surface of circulating platelets, monocytes, neutrophils, and particular T-cell subsets. CD31 is also a major constituent of the endothelial cell intercellular junction, where up to an estimated 1 million molecules are concentrated. Because of this cellular expression pattern, CD31 is implicated in several functions, including transendothelial migration of leukocytes, angiogenesis, and integrin activation. Ig superfamily members are known to mediate cell adhesion, or antigen recognition, e.g.

Hyaluronidase-1 plays a role in promoting tumor progression. Hyaluronidase-1 blocks TGFB1-enhanced cell growth. Defects in hyaluronidase-1 are the cause of mucopolysaccharidosis type 9, also called hyaluronidase deficiency. MPS9 is a lysosomal storage disease characterized by high hyaluronan (HA) concentration in the serum. The clinical features are periarticular soft tissue masses, mild short stature and acetabular erosions, and absence of neurological or visceral involvement.

Lymphatic vessel endothelial hyaluronic acid receptor 1 (LYVE-1) is a ligand-specific transporter trafficking between intracellular organelles and the plasma membrane. LYVE-1 is involved in autocrine regulation of cell growth mediated by growth regulators containing cell surface retention sequence binding (CRS). LYVE-1 acts as a hyaluronan transporter either by mediating its uptake for catabolism within lymphatic endothelial cells or its transport into the lumen of afferent lymphatic vessels for subsequent re-uptake and degradation in lymph nodes.