Table 1. ITC Analysis of PMC-5, PMC-6, PMC-7, and PMC-567 Binding to Papain.

pH Level	Kd (μM)	ΔH (kcal*mol−1)	ΔS (cal*mol−1*deg−1)
pH 5.2
PMC-5	8.1 ± 2.8	−2.83 ± 0.06	−19.8
PMC-6	9.0 ± 2.3	−2.95 ± 0.1	−17.8
PMC-7	8.9 ± 1.8	−2.75 ± 0.2	−18.5
PMC-567	14 ± 3.4	−3.47 ± 0.4	−15.4
PMC-6 truncated	NBa	NBa	NBa
pH 7.2
PMC-5	7.2 ± 3.1	−2.78 ± 0.06	−18.8
PMC-6	9.4 ± 4.2	−2.90 ± 0.1	−17.9
PMC-7	9.8 ± 3.2	−2.54 ± 0.1	−20.4
PMC-567	NB*	NB*	NB*

^aNo binding.