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ITC datum

Protein and Ligand
Protein name Trypsin
Ligand name N-alpha-(2-naphthylsulfonyl)-n-(3-amidino-l-phenylalaninyl)-d-pipecolinic acid N-alpha-(2-naphthylsulfonyl)-n-(3-amidino-l-phenylalaninyl)-d-pipecolinic acid diagram
N-alpha-(2-naphthylsulfonyl)-n-(3-amidino-l-phenylalaninyl)-d-pipecolinic acid
Interaction type Synthetic ligands
ITC data ITC data
Structure data Structure data
ITC Information
n 0.9 ± 0.06  
ΔG -36.4 ± 0.2 kJ/mol
ΔH -20.6 ± 1.9 kJ/mol
-TΔS 15.8 ± -1.9 kJ/mol
KD 0.41 ± 5.26 uM
ΔCP -2.59 ± 0.1 kJ/mol/K
Notes on error determination Not available
General comments Altered change in enthalpy and entropy from further studies on protonation events during binding, see http://scorpio2-dev.biophysics.ismb.lon.ac.uk/citation/view/94.
Warnings
Instrument Microcal MCS Titration Calorimeter
Temp. (K) 298.15 pH 7.8
Buffer Buffer Substance (Tris, Tris(hydroxymethyl)amino-methane; Tricine; N-tris(hydroxymethyl)methylglycine; Hepes; N-2-hydroxylethylpiperazine-N-2-ethanesulphonic acid; pyrophosphate) 50.00 mM PEG 8000 0.10 % Sodium Chloride Rubidium Chloride 100.00 mM
Cell content Protein
Reference J Mol Biol. [2001] 313, 593-614