Table 2.

Hydrogen bonds in the two CheY/P2 heterodimers

Heterodimer A			Heterodimer B
CheY	P2	Length, Å	CheY	P2	Length, Å
Direct
K92 Nζ	D202 O	3.3
Q100 Nɛ2	D207 Oδ1	2.9	Q100 Nɛ2	D207 Oδ1	2.3
Y106 OH	E178 Oɛ2	2.7
Y106 OH	H181 Nδ1	2.7	Y106 OH	H181 Nδ1	3.3
K119 Nζ	E178 Oɛ2	3.4
			K122 Nζ	E171 Oɛ2	3.2
K126 Nζ	C213 O	2.4	K126 Nζ	C213 O	2.3
K126 Nζ	I216 O	2.6	K126 Nζ	I216 O	2.7
Water-mediated
S104 O	HOH 306	3.4	S104 O	HOH 306	3.2
HOH 306	F214 O	3.3	HOH 306	F214 O	2.8
K122 Nζ	HOH 362	2.9
HOH 362	A169 O	2.7