1. 
   rifamycin
   Antibiotic produced by Streptomyces mediterranei that acts by inhibiting prokaryotic, but not eukaryotic DNA-dependent RNA synthesis. Blocks initiation, but not elongation of transcripts.
   Found op http://www.encyclo.co.uk/visitor-contributions.php
   
   
2. 
   rifamycin
   <drug> Antibiotic produced by Streptomyces mediterranei that acts by inhibiting prokaryotic, but not eukaryotic DNA dependent RNA synthesis. Blocks initiation, but not elongation of transcripts. ... (18 Nov 1997) ...
   Found op http://www.mondofacto.com/facts/dictionary?rifamycin
   
   
3. 
   rifamycin
   (rif″ә-mi´sin) any of a family of antibiotics biosynthesized by a strain of Streptomyces mediterranei, effective against a broad spectrum of bacteria. The five components are designated A, B, C, D, and E; rifamycins O, S, and SV are derivatives of the B component, and AG and X are deriv...
   Found op http://www.encyclo.co.uk/local/21001
   
   
4. 
   Rifamycin
   The rifamycins are a group of antibiotics that are synthesized either naturally by the bacterium Amycolatopsis mediterranei or artificially. They are a subclass of the larger family Ansamycin. Rifamycins are particularly effective against mycobacteria, and are therefore used to treat tuberculosis, ...
   Found op http://en.wikipedia.org/wiki/Rifamycin
   
   

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