non invasive measurement of biosynthesis and rates of advance of biological molecules, the direct sampling of inaccessible or not easily accessible,by inserting a marker in metabolic derivatives and katabole products

摘要

Methods of determining rate of biosynthesis or breakdown of biological molecules from metabolic derivatives and catabolic products are disclosed herein. In particular, methods of measuring the rates of biosynthesis and breakdown of biological molecules inaccessible or not easily accessible to direct sampling by sampling metabolic derivatives and catabolic products in accessible biological samples are disclosed herein.