Table 2.

Distances among xenon sites after superposition

Ngb Xe and swMb Xe atoms
Ngb•Xe atom	swMb•Xe atom	Distance (Å)
XeIII	Xe2	5.51
	Xe3	4.95
XeIV	Xe2	5.01
	Xe4	5.89
Ngb Xe and hCygb Xe atoms
Ngb•Xe atom	hCygb•Xe atom	Distance (Å)
XeIII	Xe2	4.03
	Xe3	2.03
XeIV	Xe1	5.45
	Xe2	4.66
	Xe3	4.75
	Xe4	5.84

Distances of Ngb XeIII and XeIV atoms with respect to Xe positions in Mb and Cygb. The superposition of protein structures was carried out using CE (46).