title: Studies on the de novo biosynthesis of NAD in Escherichia coli. II. Quantitative method for isolating quinolinic acid from biological materials.
mesh_terms: D002247:Carbon Isotopes; D002852:Chromatography, Ion Exchange; D002854:Chromatography, Paper; D004926:Escherichia coli / Q000378:metabolism*; D008722:Methods; D009243:NAD / Q000096:biosynthesis*; D011725:Pyridines / Q000032:analysis / Q000302:isolation & purification*; D013053:Spectrophotometry; D014466:Ultraviolet Rays
chemical_list: D002247:Carbon Isotopes; D011725:Pyridines; D009243:NAD