Table 1. Summary of Association Constants of Different Matching/Mismatching Sequences.

Binding Partner	Ka (M–1)	Type	Binary Code
(AX)1-(BX)1	1300 ± 300	Monovalent	1
(AX)2-(BX)2	12 500 ± 1100	Divalent	11
(AX)3-(BX)3	81 400 ± 7300	Trivalent	111
A3X3-B3X3	<2000	No Spacer	111
ABA-BAB	79 400 ± 5200	Mixed Trivalent	111
(BX)3-BAB	–	–	Mismatch
AAYA-BYBB	21 100 ± 6100	Divalent (Spaced)	1101
(AX)3-BYBB	9400 ± 800	Divalent	Mismatch