Biological markers are the measures of a specific biological state. By definition, a biomarker is "a characteristic that is objectively measured and evaluated as an indicator of normal biological processes, pathogenic processes or pharmacological responses to a therapeutic intervention."
Biomarker discovery may be a medical term describing the method by which biomarkers are discovered. Currently available biomarkers, like those wont to diagnose myocardial infarct (e.g., cardiac troponins), were identified within the course of targeted physiologic studies. Similarly, basic investigation of diseases has largely been characterized by studies of isolated molecules in cellular systems
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