title: Purification and resolution of the optical isomers of labeled tryptophan metabolites on powdered paper columns.
mesh_terms: D001345:Autoradiography; D002250:Carbon Radioisotopes; D002845:Chromatography; D002854:Chromatography, Paper; D005069:Evaluation Studies as Topic; D007737:Kynurenine / Q000302:isolation & purification*; D008722:Methods; D009904:Optical Rotation; D010209:Paper; D014364:Tryptophan / Q000302:isolation & purification* / Q000378:metabolism; D062367:ortho-Aminobenzoates / Q000302:isolation & purification*
chemical_list: D002250:Carbon Radioisotopes; D062367:ortho-Aminobenzoates; D007737:Kynurenine; D014364:Tryptophan