Table 2. Hydrogen bonding energy calculated based on an empirical equation.

Complex	Hydrogen bonding	HB energy (kcal/mol)
8CA-A-FABP	O2…R126HE	−0.76±0.11
	O1…R126HH21	−2.50±0.19
	O1…Y128HH	−1.81±0.20
	O2…Y128HH	−0.69±0.12
F8A-A-FABP	O12…R126HE	−1.17±0.14
	O11…R126HH21	−1.77±0.16
	O11…Y128HH	−0.46±0.10
	O12…Y128HH	−2.05±0.18
I4A-A-FABP	O26…R126HE	−1.34±0.13
	O27…R126HH21	−1.80±0.13
	O27…Y128HH	−0.51±0.10
	O26…Y128HH	−2.60±0.15
	H18…S55OG	−0.55±(0.12)