Abstract: A method for high throughput screening of probes is described. These probes are useful for characterization and measurement of unbound metabolites in a fluid sample, particularly characterization and measurement of levels of unbound free fatty acids. By practice of the disclosed invention, a profile of unbound metabolites can be determined for an individual which can be used to determine the individual's relative risk for disease such as stroke, cardiac disease and cancer.

Abstract: Methods of determining levels of unbound metabolites are disclosed. Probes derived from fatty acid binding protein muteins are described that bind preferentially to a number of unbound metabolites including oleate, stearate, linoleate, palmitate, arachidonate and unconjugated bilirubin. A profile for a patient is determined using one or more of the described probes. The profile is useful in diagnosis of disease, particularly myocardial infarction, non-alcoholic fatty liver disease (NAFLD), diabetes, stroke, sepsis and neonatal jaundice. The responses of multiple probes to a test sample are used to classify the degree of acute coronary syndrome by comparison to multi-probe profiles generated from unstable angina, non ST elevation myocardial infarction, and ST elevation myocardial infarction.

Abstract: A method for high throughput screening of probes is described. These probes are useful for characterization and measurement of unbound metabolites in a fluid sample, particularly characterization and measurement of levels of unbound free fatty acids. By practice of the disclosed invention, a profile of unbound metabolites can be determined for an individual which can be used to determine the individual's relative risk for disease such as stroke, cardiac disease and cancer.

Abstract: A method for high throughput screening of probes is described. These probes are useful for characterization and measurement of unbound metabolites in a fluid sample, particularly characterization and measurement of levels of unbound free fatty acids. By practice of the disclosed invention, a profile of unbound metabolites can be determined for an individual which can be used to determine the individual's relative risk for disease such as stroke, cardiac disease and cancer.

Abstract: A method and apparatus for determining the concentration of molecules or atoms by measuring the ratio of two fluorescence signals. A sample having fluorescent molecules is exposed to radiation or excitation energy from a first source, which can be a broadband light source. The fluorescence of the sample is detected at two different wavelengths. The concentration of specific molecules or atoms within the sample is determined using the ratio of the two fluorescence signals. Fluorescent molecules can be bound to a human serum or plasma sample to allow determination of the concentration of unbound free fatty acids in the sample.