Ready-to-use AssayComplete Puromycin is sterile-filtered and belongs to the amino-nucleoside family of antibiotics and is isolated from S. alboniger. Puromycin is a broad spectrum antibiotic and antibacterial agent. It is active against Gram-positive microorganisms, less active against acid-fast bacilli, and weakly active against Gram-negative microorganisms. For effective concentrations of Puromycin to be used in cell culture kits, please refer to cell line specific datasheet.