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. Author manuscript; available in PMC: 2017 Jan 1.
Published in final edited form as: Protein Expr Purif. 2015 Sep 25;117:35–43. doi: 10.1016/j.pep.2015.09.023

Table 2.

Cystatin C inhibition equilibrium constants from enzymatic assays. Values given are mean ± standard error.

Enzyme Km (μM) CysC fraction Ki (pM)
Papain 110 ± 10 monomer < 5 ± 4
oligomer < 7 ± 5
Cathepsin B 22 ± 3 monomer 60 ± 20
oligomer 100 ± 30