FH binding to normal washed platelets. FH on normal washed platelets (from citrated tubes) was detected by 16% binding (median; range, 12%-21%) of goat anti-human FH to the platelet population. When platelets were incubated with normal FH, additional binding was detected, but less so when the platelets were incubated with the FH-E1198Stop mutant. Results are expressed as median plus or minus SD.