Equilibrium molar fractions of species


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Points correspond to steps in titration series corresponding to Rtotal and LRratio used in NMR line shape simulations below. Curves are smooth functions simulated at constant Rtotal. Populations of multimeric species are shown per monomer. Population of free ligand is normalized to total receptor concentration.

Isothermal Titration Calorimetry profile


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Heat uptake curve is simulated as a derivative of the population of species multiplied by specific dH.

U_L_Af_Bs
Fast binding, slow isomerization

Equilibrium constants:
Ka(A)=1.00e+06
Ka(B)=3.00e+00

Rate constants (1-forward, 2-reverse):
k1(A)=5.00e+08
k2(A)=5.00e+02
k1(B)=3.00e+01
k2(B)=1.00e+01

Chemical shifts:
w0(R)=50.0 /s (8.0 Hz)
w0(RL)=250.0 /s (39.8 Hz)

Base relaxation rates:
R2(R)=10.0 /s
R2(RL)=10.0 /s

Enthalpy difference from the base state:
dH(R)=0.0
dH(RL)=-1.0

Total R concentration (*1000):
1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00 1.00

Ratio of total L to total R:
0.00 0.10 0.20 0.30 0.40 0.50 0.60 0.70 0.80 0.90 1.00 1.25 1.50 2.00 2.50

1D-spectra of the titration series


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Traces (bottom to top) correspond to L/R ratios indicated by points in the Populations graph (above). Red dots indicate peak maxima for a visual aid (also plotted as the chemical shift titration curves on the right). Dashed lines indicate chemical shifts of individual species.

Chemical shift titration curves


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Points correspond to positions of peak maxima numerically detected in the spectral traces. Sometimes not all peaks will be detected and signal/noise here is not considered.