Gentamycin is an aminoglycoside antibiotic complex from Micromonospora purpurea and consists of closely related compounds: gentamycin C1, C1a, C2, C2a and C2b. Inhibits bacterial protein synthesis by binding to the ribosomal 30S subunit and causing misreading of mRNA (in a similar way as streptomycin).
Broad spectrum antibiotic which inhibits growth of many gram positive and gram negative bacteria including strains which are resistant to chloramphenicol, kanamycin or tetracycline. Frequently used in cell culture, often in combination with amphotericin B, nystatin or penicillin G (1,3).
Formulated to contain 50 mg/ml gentamycin base in deionized water.

50 mg gentamycin base correspond to approx. 50 000 units of gentamycin and are approx. 80 mg gentamycin sulfate.