>98% [HPLC]. Free AMC < 60ppm
Aminopeptidase substrate: D. Mantle et al., Biochem. J., 211, 567 (1983). Fluorogenic substrate in a sensitive assay for microbial aminopeptidase: Y. Sanz, J. Food Sci., 62, 583 (1997). Used in a rapid method for differentiating Gram-positive from Gram-negative bacteria: M. Manafi and W. Kneifel, J. Appl. Bacteriol., 69, 822 (1990).