Dark brown liquid. Unique aminoglycoside antibiotic that inhibits the growth of prokaryotic (bacteria) and eukaryotic microorganisms (yeasts) and mammalian cells. Inhibits protein synthesis at the translocation step on the 70S ribosome and causes misreading of the mRNA. Hph, a gene from E. coli, encodes resistance to hygromycin B and can be isolated and cloned by recombinant DNA techniques. This hygromycin B-resistance gene is particularly useful for identification or selection of recombinant clones in a variety of cell types. Hygromycin B penetrates cells that have been permeabilized by viral infection and can act as an effective antiviral agent. Biological activity: The activity of Hygromycin B is measured in a zonal inhibition assay using Bacillus subtilis. The activity is measured relative to a reference standard.. Purity: ≥85% by HPLC and TLC. Bioassay: 350-450 units/mg solution. RTECS WK2130000, CAS 31282-04-9.

Merck Index: 14, 4852
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R: 26/27/28-37/38-41; S: 26-36/37/39-45-23