The complement system is an important part of the humoral immune defence in mammals that is formed by about 35 soluble and cell-surface proteins. Together these proteins enable the host to recognize ...

The alternative complement pathway is essential for defense against infection by polysaccharide-encapsulated bacteria. Factor B, factor D, and properdin are required to stably initiate the process. 1 ...

The complement of set B, B’, contains all the elements that are not in set B. \(P’\) is the complement of set \(P\). The intersection of one set and the complement of another set identifies elements ...