WordNet

make complete or perfect; supply what is wanting or form the complement to; "I need some pepper to complement the sweet touch in the soup"
a complete number or quantity; "a full complement"
one of a series of enzymes in the blood serum that are part of the immune response
something added to complete or embellish or make perfect; "a fine wine is a perfect complement to the dinner"; "wild rice was served as an accompaniment to the main dish" (同)accompaniment
number needed to make up a whole force; "a full complement of workers" (同)full complement
a word or phrase used to complete a grammatical construction
either of two parts that mutually complete each other
an artifact that is one of the individual parts of which a composite entity is made up; especially a part that can be separated from or attached to a system; "spare components for cars"; "a component or constituent element of a system" (同)constituent, element
an abstract part of something; "jealousy was a component of his character"; "two constituents of a musical composition are melody and harmony"; "the grammatical elements of a sentence"; "a key factor in her success"; "humor: an effective ingredient of a s (同)constituent, element, factor, ingredient

PrepTutorEJDIC

(あるものを完全にするため)(…を)補う物(事)《+『of』+『名』》 / 補語(文法で文の成分の一つ) / (必要な)全数,全量;(船の)定員 / …を補足する,補う
構成している,成分の / 構成要素,成分

出典(authority):フリー百科事典『ウィキペディア（Wikipedia）』「2015/11/17 00:21:27」(JST)

Complement component 4 is a protein involved in the complement system.

It is cleaved into proteins 4a and 4b; 4b can be further cleaved into 4c and 4d.^[1]

Classical pathway. (Some labels are in Polish.)

It is responsible for the Chido Rodgers blood group system.^[2]

C4d has been identified as a biomarker for systemic lupus erythematosus.^[3]

^ http://www.immunologyreport.com/ATC2013/pdf/MacConmara.pdf
^ Chido Rodgers blood group system at BGMUT Blood Group Antigen Gene Mutation Database at NCBI, NIH
^ Liu CC, Manzi S, Kao AH, Navratil JS, Ruffing MJ, Ahearn JM (2005). "Reticulocytes bearing C4d as biomarkers of disease activity for systemic lupus erythematosus". Arthritis Rheum. 52 (10): 3087–99. doi:10.1002/art.21305. PMID 16200588.

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1. 補体系の概要および臨床的評価 overview and clinical assessment of the complement system
2. 小児における溶血性尿毒症症候群の概要 overview of hemolytic uremic syndrome in children
3. 補体系の後天性欠損 acquired deficiencies of the complement system
4. C3糸球体腎症：デンスデポジット病およびC3糸球体腎炎 c3 glomerulopathies dense deposit disease and c3 glomerulonephritis
5. 補体系の遺伝性疾患 inherited disorders of the complement system

Hereditary angioedema and lupus: A French retrospective study and literature review.

Gallais Sérézal I1, Bouillet L2, Dhôte R3, Gayet S4, Jeandel PY5, Blanchard-Delaunay C6, Martin L7, Mekinian A8, Fain O9.
Autoimmunity reviews.Autoimmun Rev.2015 Jun;14(6):564-568. doi: 10.1016/j.autrev.2015.02.001. Epub 2015 Feb 4.
Hereditary angioedema (HAE) is a rare genetic disorder that is primarily caused by a defect in the C1 inhibitor (C1-INH). The recurrent symptoms are subcutaneous edema and abdominal pain. Laryngeal edema, which can also occur, is life threatening if it goes untreated. HAE can be associated with some
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Structural Basis for the Function of Complement Component C4 within the Classical and Lectin Pathways of Complement.

Mortensen S1, Kidmose RT1, Petersen SV2, Szilágyi Á3, Prohászka Z3, Andersen GR4.
Journal of immunology (Baltimore, Md. : 1950).J Immunol.2015 Jun 1;194(11):5488-96. doi: 10.4049/jimmunol.1500087. Epub 2015 Apr 24.
Complement component C4 is a central protein in the classical and lectin pathways within the complement system. During activation of complement, its major fragment C4b becomes covalently attached to the surface of pathogens and altered self-tissue, where it acts as an opsonin marking the surface for
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Preeclampsia in autologous and oocyte donation pregnancy: is there a different pathophysiology?

Lashley LE1, Buurma A2, Swings GM3, Eikmans M3, Anholts JD3, Bakker JA4, Claas FH3.
Journal of reproductive immunology.J Reprod Immunol.2015 Jun;109:17-23. doi: 10.1016/j.jri.2015.03.004. Epub 2015 Mar 30.
Oocyte donation (OD) is a specific method of artificial reproductive technology that is accompanied by a higher risk of preeclampsia during pregnancy. The pathophysiological mechanism underlying preeclampsia in OD pregnancies is thought to differ from preeclampsia in autologous pregnancies. As preec
PMID 25863695