Table 2.

Possible electrostatic interactions and H bonds between S1 and AC3 and AC1 (see Fig. 1 for explanation)

Potential electrostatic interactions		Potential H bonds
AC3 – S1	AC1 – S1	AC3 – S1	AC1 – S1
ASP24 – GLU629	LYS50 – GLU576	GLY23 N – LYS637 O	LYS50 NZ – ASN552 OD1
ASP25 – LYS640	ARG95 – GLU576	ASP24 N – GLY635 O	ARG95 NE – PRO570 O
ARG28 – GLU629	GLU99 – LYS569	LYS328 NZ – ARG371 O	ARG95 NH1 – ALA575 O
ARG147 – GLU373		TYR337 OH – ASN410 OD1	ARG95 NH2 – LYS572 O
GLU167 – LYS544		SER348 OG – LYS637 O	GLY46 O – LYS553 NZ
ASP311 – ARG371		THR351 N – PRO529 O	GLY48 O – LYS553 N
LYS328 – GLU372		THR351 OG1 – PRO529 O	GLN49 OE1 – SER549 OG
GLU334 – LYS642		GLY23 O – GLY638 N	TYR91 O – ALA571 N
ARG335 – GLU372		ARG28 O – ASN410 ND2
LYS336 – GLU411		SER145 O – GLY643 N
		GLU167 O – LYS544 NZ
		GLN314 OE1 – ARG371 NH1
		ILE329 O – ARG371 NH2
		GLU334 O – LYS642 NZ