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- W1502671196 abstract "In the present work a scheme is presented for the isolation of multiple components of human complement in a functionally and biochemically pure state and with full hemolytic activity. These preparative procedures allow high recovery of milligram and gram quantities of particular complement components from a large pool (2-11 liters) of fresh EDTA plasma in no more than four chromatographic steps. Many components (C3bINA, C5, C3, C1EI, C4, and C9) are recovered functionally pure or highly purified following the first chromatographic step employing DEAE-Sephacel and may be utilized as reagents with no further purification. Prior to anion exchange, individual units of plasma are treated with inhibitors of complement activation and serum proteases, the pooled plasma is fractionated with polyethylene glycol, depleted of plasminogen on Sepharose-lysine, and rapidly ultrafiltered to low ionic strength and high protein concentration. The high degree of resolution of the components on DEAE-Sephacel subsequently obtained is demonstrated by the functional recovery and purification in a representative experiment as indicated (in their order of elution) for the following proteins: C3bINA (24%, 18-fold), C2 (74%, 12-fold), C7 (87%, 14-fold), factor B (55%, 8.7-fold), C8 (50%, 16-fold), C6 (82%, 25-fold), beta 1H (39%, 12-fold), C5 (62%, 111-fold), C3 (99%, 64-fold), C1EI (42%, 135-fold), C9 (80%, 297-fold), and c4 (78%, 164-fold). Other components separated by these procedures include C1q and C4 binding protein. Additional steps described, which demonstrate the utility and effectiveness of this preparative scheme, have allowed isolation of C3, C5, and C7 as pure components with full hemolytic activity as judged by functional, immunochemical, and physicochemical criteria. C8, also isolated as a homogeneous protein, was recovered with partial hemolytic activity. All these components were recovered in high yield and in the purification as indicated: C3 (61%, 103-fold), C5 (24% 1350-fold), C7 (19%, 2260-fold), and C8 (32%, 547-fold). Complement components C6, beta 1H, factor B, and C2 in addition to C3bINA, C1EI, C4, and C9 are recovered partially purified with good activity and are amenable to further purification." @default.
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- W1502671196 date "1981-04-01" @default.
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- W1502671196 title "Large scale isolation of functionally active components of the human complement system." @default.
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- W1502671196 doi "https://doi.org/10.1016/s0021-9258(19)69557-8" @default.
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