title: Detection, with the dye phloxine B, of yeast mutants unable to utilize nitrogenous substances as the sole nitrogen source.
abstract: Yeast mutants unable to degrade certain nitrogen compounds produce characteristic small red colonies on an agar medium containing the red dye phloxine B, galactose, the test nitrogen compound, and a small amount of ammonium chloride.
mesh_terms: D001120:Arginine / Q000378:metabolism*; D005452:Fluoresceins; D005796:Genes; D008722:Methods; D009154:Mutation; D012441:Saccharomyces cerevisiae / Q000378:metabolism*
chemical_list: D005452:Fluoresceins; D001120:Arginine