Categories: Protein pages needing a picture | Genes on chromosome 12 | Protein stubs | Proteins Medical Subject Headings (MeSH) is a huge controlled vocabulary (or metadata system) for the purpose of indexing journal articles and books in the life sciences. ... A representation of the 3D structure of myoglobin, showing coloured alpha helices. ... A complement protein attacking an invader. ... This article may be too technical for most readers to understand. ... Please wikify (format) this article as suggested in the Guide to layout and the Manual of Style. ... The alternative pathway of the complement system is a humoral component of the immune systems natural defence against infections which can operate without antibody participation. ... C3-convertase is the name of the enzyme composed of the C4b-C2b complex, which forms during the Classical pathyway of the complement system. ... The membrane attack complex (MAC) is formed on the surface of intruding pathogenic bacterial cells as a result of the activation of the complement system, and it is one of the ultimate weapons of the immune system. ... Complement component 6 is a protein involved in the complement system. ... Complement component 7 is a protein involved in the complement system. ... Complement component 8 is a protein involved in the complement system. ... Complement component 9 is a protein involved in the complement system. ... Mannose binding lectin (MBL), also named mannose- or mannan-binding protein MBP, is an important factor in the innate immunity. ... Properdin is a globulin protein found in the blood serum of humans. ... The C1q complex is potentially multivalent for attachment to the complement fixation sites of immunoglobulin. ... Complement component 1R is a protein involved in the complement system. ... Complement component 1S is a protein involved in the complement system. ... Complement component 4 is a protein involved in the complement system. ... Complement component 2 is a protein involved in the complement system. ... In immunology, soluble C3-convertase, also known as iC3Bb, catalyzes the proteolytic cleavage of C3 into C3a and C3b as part of the alternative complement system. ... Complement component 5 is a protein involved in the complement system. ... C5a is a protein fragment released from complement component C5. ... MASP1 is a protein involved in the complement system. ... MASP2 is a protein involved in the complement system. ... BF is a protein involved in the complement system. ... DF is a protein involved in the complement system. ... C1-inhibitor (C1inh) is a serine protease inhibitor (serpin) protein, the main function of which is inhibition of the complement system. ... Decay accelerating factor is a protein involved in the complement system. ... Complement Factor I (fI) is a protein of the Complement system, first isolated in 1966 in guinea pig serum[1] that regulates complement activation by cleaving cell-bound or fluid phase C3b and C4b. ... C4BP (Complement C4B-binding protein) can refer to: C4BPA (protein) C4BPB (protein) Category: ... Factor H is a member of the regulators of complement activation family and is a complement control protein. ... A Complement receptor is a receptor of the complement system, a part of the mediated innate immune system. ... Complement receptor 1 Also known as CR1, CD35, C3b/C4b receptor and immune adherence receptor. ... Complement component receptor 2 is a protein involved in the complement system. ... Integrin alpha M is a protein involved in the complement system. ... CDC11c is a type I transmembrane protein found at high levels on most human dendritic cells, but also on monocytes, macrophages, neutrophils, and some B cells that induces cellular activation and helps trigger neutrophil respiratory burst; expressed in hairy cell leukemias, acute nonlymphocytic leukemias, and some B-cell chronic lymphocytic... CD18 is the beta subunit of LFA-1. ... C5AR1 is a receptor for C5a. ...