Table 2.

Intermolecular interaction energy (ΔE) values and hydrogen bonds between K203 and both AChE species

AChE	Interaction Energy (kcal.mol− 1)	H-Bonds	H-bond Strength (kcal.mol− 1)
Human	−89.78	H2O	− 4.92
		H2O	−2.50
		H2O	−1.47
		H2O	−1.39
		H2O	−4.73
		H2O	−4.79
		Tyr120	−0.66
		Gly117	−1.34
Rat	−101.94	H2O	−3.89
		H2O	−2.41
		Thr238	−6.12
		Gly234	−5.00