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Small molecular weight drug-protein interaction measured with MP-SPR

Application Note #144


Kinetic evaluation of indomethacin binding. Different concentrations of analyte (coloured curves) and fit (black curves).

The interaction of a small molecular weight drug (indomethacin) to Human serum albumin (HSA) was measured with label-free Multi-Parametric Surface Plasmon Resonance (MP-SPR). HSA was attached to a sensor surface with amine coupling chemistry. Affinity (KD) and kinetic constants (kand kd) of indomethacin interaction were determined with TraceDrawer™ for MP-SPR Navi™. Premium quality kinetic data was ensured using PureKinetics™ feature that separates bulk effect from binding kinetics.

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Further reading

  • If you are interested in reading more about small molecules, have a look at AN#155 about faster interaction measurements using KineticTitration and AN#137 about cell interactions.
  • Do you want to find out how to calculate thickness out of MP-SPR measurements? Click here
  • Do you want to see how MP-SPR instruments work? Click here
  • Do you want to see MP-SPR instruments comparison? Click here