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⭐️IgM is the best antibody because it’s pentavalent
⭐️Each molecule of C1-C9 is cleaved into a&b
-a is anaphylatoxins: degenerats mast cells
-b called opsin helps with opsinization most importantly C3b
⭐️C1 inhibitor located between c1r&c1q
-it prevents activation of complement
-deficiency leads to hereditary angioedema
⭐️IgM best complement fixing antibody
⭐️IgG best opsonization antibody
⭐️C1q binds either to 1 IgM OR it binds to at least 2 IgG
⭐️binding of C1q to Ig activates C1r which cleaves and activates the series protease C1s
⭐️we need 1000 IgG to fix complement
-while we need only 1 IgM to fix complement
⭐️One molecule of C4b,2b can cleave up to 1000 molecules of C3 to C3b
⭐️C4b,2b > C3 convertase
-C4b,2b,3b > C5 convertase
⭐️C5a : chemotactic for neutrophils¯ophages
⭐️ opsonization, and phagocytosis function of C1-C4
⭐️C5-C9 lytic complex
⭐️ 10-16 molecules of C9 bind to form a pore in the membrane
⭐️ Calcium & antibodies activates C1 complex
⭐️ C4b2b3b is C5 convertase; it leads into the Membrane Attack Pathway
⭐️C1-INH deficiency → hereditary angioedema due to overproduction of C2a/prokinin.
⭐️C1-INH deficiency → hereditary angioedema
⭐️C1-C4 Clean complexes
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Repost from UOBCOM | 98 | Quizzes
ملحوظة تعديل:Slide 16: Components of the lytic complex > C5-C9
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اخيرا خلصت اريد ابلش اقره 😬
صارلي مدري شكم ساعة
عموما هاي الملخصات كاملة بس لازم تقرون قبلها الملزمة سريع لان يظل Ai ممكن ينسى شي
و بمناسبة العيد خاف تنشغلون و تشيلون هم للمادة ترا عليها 0.25
و كل عام و انتم بخير و صحة و سلامة مقدماً 🎆
