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An unusual alpha-amino acid with a very potent fluorescent activity. DL-7-Azatryptophan hydrate can be used as a vehicle for probing the structure and dynamics of protein and peptides.

DL-7-Azatryptophan is a racemic mixture of D- and L-7-azatryptophan which together with L-tryptophan is a synergistic inducer of tryptophan oxygenase of Pseudomonas acidovorans. DL-7-Azatryptophan inhibits photosynthetic carbon assimilationphotosynthetic oxygen evolution and nitrogen metabolism in Anabaena sp. Strain 1Fa marine filamentousheterocystous cyanobacterium.