Table 3.

R/S ratio in IgM and IgG from young and aged humans

	Observed R/S ratio
	CDR			FR
	CDRs	CDR1	CDR2	FRs	FR1	FR2	FR3
IgM memory
Young	2·6	7·0	1·8*	2·1	2·1	0·8	2·4
Aged	3·9	4·1	3·8*	1·7	1·5	0·8	2·2
IgG
Young	2·5	3·4	2·3	2·0	2·0	1·0	2·3
Aged	2·2	2·8	2·1	2·0	1·7	1·2	2·5

^*P < 0·05.