Article
Quantitative and antigenic differences in complement component C4 between American blacks and whites.
Complement and inflammation - 1 Jan 1991
Moulds J M, Warner N B, Arnett F C
Abstract excerpt
A population of 98 healthy Black Americans was studied in order to determine normal ranges for total C4, C4A and C4B. Mean total C4 in Blacks measured by an enzymelinked immunoassay (EIA) was 44 +/- 12.8 mg/dl which was significantly different (p less than 0.001) from Caucasian levels of 31.7 +/- 11.5 mg/dl. The difference in total C4 was due to increased levels of C4B in Blacks (means = 24.4 mg/dl) as compared...
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