TDA Reagent 10ML

TDA Reagent is used to determine the tryptophan-deaminase activity.Tryptophan deamination is of reductive type where the ‘NH2’ group of tryptophan is removed and released as ammonia and energy, which is utilized by bacteria. The presence of tryptophan deamination activity can be detected by addition of TDA reagent indicated by dark brown colouration. Escherichia coli ATCC 25922 Negative(no colour change around colony);Proteus mirabilis ATCC 25933 Positive (dark brown colouration around colony)