Reduction of azo dyes by intestinal anaerobes.

AUTOR(ES)

Chung, K T

RESUMO

Reduction of seven azo dyes (amaranth, Ponceau SX, Allura Red, Sunset Yellow, tartrazine, Orange II, and methyl orange) was carried out by cell suspensions of predominant intestinal anaerobes. It was optimal at pH 7.4 in 0.4 M phosphate buffer and inhibited by glucose. Flavin mononucleotide caused a marked enhancement of azo reduction by Bacteroides thetaiotaomicron. Other electron carriers, e.g., methyl viologen, benzyl viologen, phenosafranin, neutral red, crystal violet, flavin adenine dinucleotide, menadione, and Janus Green B can replace flavin mononucleotide. These data suggest that an extracellular shuttle is required for azo reduction.

Documentos Relacionados

• Reduction of Polymeric Azo and Nitro Dyes by Intestinal Bacteria
• Formation of indoleacetic acid by intestinal anaerobes.
• The Function of Cytoplasmic Flavin Reductases in the Reduction of Azo Dyes by Bacteria
• In vitro inhibition of Neisseria gonorrhoeae growth by strict anaerobes.
• Preparing inoculum for susceptibility testing of anaerobes.