Table 2. Frequency of increased rigidity vs. increased flexibility.

Antibody	Chain	Flexibility increases a		Rigidity increases a
		2.3 ≤ x < 3.3	3.3 ≤ x	-3.3 < x ≤ -2.3	x ≤ -3.3
		whole FABs
Anti-Fluorescein	H	6	19	19	3
	L	26	15	23	1
Anti-CD3	H	2	0	20	29
	L	16	20	5	3
Esterase catalytic Ab	H	2	3	21	37
	L	29	38	3	1
Total		81	95	91	74
		Complementarity Determining Regions
Anti-Fluorescein	H	0	8	5	0
	L	11	6	0	0
Anti-CD3	H	0	0	8	11
	L	1	3	0	0
Esterase catalytic Ab	H	0	0	15	10
	L	11	14	0	0
Total		23	31	28	21
		CDR H3
Anti-Fluorescein		0	0	5	0
Anti-CD3		0	0	7	3
Esterase catalytic Ab		0	0	7	3
Total		0	0	19	6
		CDR L2
Anti-Fluorescein		5	3	0	0
Anti-CD3		4	3	0	0
Esterase catalytic Ab		5	2	0	0
Total		14	8	0	0

^a The counts of amino acids belonging to this classification.