DO Supplement-Trp-His-Ura (Amino Acid Mixture)

DO Supplement (Dropout Supplement) is a mixture composed of essential amino acids and two nucleotides. It is used to prepare SD (synthetic dropout) medium formulated from glucose, YNB (amino acid free), Dropout. Every DO Supplement is lack of one or more components so to screen strains that can synthesize this component, or to activate corresponding reporter genes. DO Supplement-His contains all essential amino acids, Ade, Ura, etc. , except His, it can be used to screen yeast positive strains containing plasmid expressing His synthesizing gene. It can also be used in transformation screening of plasmids such as pLexA and activation assays of the histidine reporter gene. In addition, it can be used in interactions and protein expression in yeast, ion tolerance, functional complementation, and mutant identification and classification experiments.