Characterization of DAF-2, a high molecular weight form of decay-accelerating factor (DAF; CD55), as a covalently cross-linked dimer of DAF-1.

Human E express two surface forms of decay-accelerating factor (DAF; CD55). On SDS-PAGE under reducing conditions the major form, DAF-1, migrates as a 70-kDa protein and the minor form, DAF-2, present at