Abstract: The metabolic processes involved in the formation of any glucose-based metabolite are determined. A precursor molecule is labeled with a stable carbon (13C) isotope at specific positions. The label is allowed to distribute and rearrange in the system. Metabolites are recovered and analyzed against a control system to determine metabolic pathway substrate flux caused by changes to the test system relative to the control system such as the addition of compound being tested as a potential drug.

Abstract: A method of doing business is disclosed whereby the process for selecting drug candidates is improved. The method involves the application of a technology which makes it possible to determine metabolic processes involved in the formation of any glucose-based metabolite. A precursor molecule is labeled with a stable carbon (13C) isotope at specific positions. The label is allowed to distribute and rearrange in the system. Metabolites are recovered and analyzed against a control system or known biochemical reactions and/or cycles to determine information such as metabolic pathway substrate flux caused by a compound acting on the system.