A rapid, infrared spectroscopic method has been developed to assess the efficacy of targeted chemotherapeutics against the structure of the polypeptide target, based on the effect of natural polymorphic sequence variation on the conformation of the protein. This method has an advantage over the current genomics-based screening, as the new method provides a direct readout of the structural, and hence functional, outcome of polymorphisms to the protein region targeted by drugs. It allows rapid measurement of a proteins susceptibility to therapeutic targeted agents, prior to using the drug as treatment in the patient. This method can be used to identify biomarkers for a response for a protein to a drug which can be readily tested, interpreted, and used in a clinical setting.
