Article
SP‐40,40, a protein involved in the control of the complement pathway, possesses a unique array of disulphide bridges
3 Feb 1992
Abstract excerpt
SP-40,40 is a two-chain serum protein which acts in vitro as a potent inhibitor of the assembly of the membrane attack complex of human complement. It contains 10 cysteine residues, the numbers and locations of which are conserved in several mammalian species. Evidence is presented that all the cysteine residues are involved in interchain (alpha-beta) disulphide bonds. There are no free cysteine residues. The...
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