Table 1.

Average number of waters and water–protein hydrogen bonds^a.

	Single HB water	Double HB water	Bridging water
# of waters	325.7 ± 13.7	133.0 ± 8.0	19.6 ± 3.0
# of H-bonds	1	2.4 ± 0.1	2.9 ± 0.2

^aAverage ± standard deviation.