Table 3.

Molecular Bases for Partial Deficiencies of C4A and C4B in the Normal Caucasian Population

	C4AQ0		C4BQ0		Total
	n	Percent	n	Percent	n	Percent
Gene deletion	36	12	15	5.	51	17
Mono-L	3	1.0	15	5.0	18	6
Mono-S	33	11.0	0	0	33	11
Gene mutation	2	0.67	0	0	2	0.67
Gene conversion	2	0.67	40	13.3	42	14.0
C4A-C4A			(40)	(13.3)
A3-A3			(30)	(10.0)
A3-A2			(8)	(2.67)
Others			(2)	(0.67)
C4B-C4B	(2)	(0.67)
Total	40	13.3	55	18.3	95	31.6