Table 5. Ligand Efficiency for Compounds Used in This Study.

compd	mass (Da)	KD (mM), 10 °C, pH 7	ΔG (kJ·mol−1)	no. of non-H atoms	ligand efficiency (Δg = kJ·mol−1/non-H atom)
13	219.2	0.0019 ± 0.0002	−32.62	16	−2.04
CDP	403.2	0.097 ± 0.006	−21.75	26	−0.87
7	305.2	0.925 ± 0.71	−16.44	20	−0.82
FLUC	261.3	2.02 ± 0.42	−14.60	18	−0.81
CMP	323.2	0.903 ± 0.107	−16.49	21	−0.79
AraCMP	243.1	18.91 ± 5.8	−9.34	21	−0.44
CDV	279.2	∼40	−7.57	18	−0.42