Table 3.

The salt bridges formed in the structures of Zn:Aβ40 and Zn:Aβ42 along with their probabilities

Donor	Acceptor	Probability (%)
		Zn:Aβ40			Zn:Aβ42
		R(C–N) ≤4 Å	R(C–N) ≤5 Å	R(C–N) ≤6 Å	R(C–N) ≤4 Å	R(C–N) ≤5 Å	R(C–N) ≤6 Å
Arg5	Asp1	55.1	63.5	65.1	82.8	93.3	94.3
Arg5	Glu22	13.1	13.4	13.5	14.9	15.2	15.2
Arg5	Asp7	23.2	29.6	34.1	26.1	29.7	32.1
Arg5	Glu3	20.2	21.4	21.6	5.1	5.7	5.9
Arg5	Asp23	14.0	15.3	16.3	12.9	12.9	13.0
Lys16	Glu22	1.0	1.3	1.4	19.7	26.5	27.7
Arg5	Glu11	0.1	0.7	1.3	2.0	7.1	22.5
Lys28	Glu3	1.3	1.8	1.9	0.2	0.4	0.5

R(C–N) is the distance between the carboxylate carbon atom and the side-chain or N-terminal nitrogen atom