Table 1. Electrophoretic mobility (Mr) and gene frequency of the allelic size isoforms of CR1.

Official name	Old name(s)	CR1 size (Mr) (non reduced)	CR1 size (Mr) (reduced)	N Number of LHRs	Frequency
CR1*4	D	250,000	280,000	6	<0.01
CR1*2	B or S	220,000	250,000	5	0.15
CR1*1	A or F	190,000	220,000	4	0.83
CR1*3	C or F’	160,000	190,000	3	0.01

Modified from [11]. Official names [18]. S, slow and F, fast, reflecting Mr on sizing gels.