RT Journal A1 Arita, Masanori T1 In Silico Atomic Tracing by Substrate-Product Relationships in Escherichia coli Intermediary Metabolism JF Genome Research JO Genome Research YR 2003 FD November 01 VO 13 IS 11 SP 2455 OP 2466 DO 10.1101/gr.1212003 UL http://genome.cshlp.org/content/13/11/2455.abstract AB We present a software system that computationally reproduces biochemical radioisotope-tracer experiments. It consists of three main components: A mapping database of substrate-product atomic correspondents derived from known reaction formulas, a tracing engine that can compute all pathways between two given compounds by using the mapping database, and a graphical user interface. As the system can facilitate the display of all possible pathways between any two compounds and the tracing of every single carbon, nitrogen, or sulfur atom in the metabolism, it complements and bridges other metabolic databases and simulations on fixed models.