Redox potential changes in the 2-keto-L-gulonic acid fermentation—II. Relationship between redox potential and product formation

✍ Scribed by Tengerdy, Robert P.

• Publisher: Wiley (John Wiley & Sons)
• Year: 1961
• Weight: 262 KB
• Volume: 3
• Category: Article
• ISSN: 0368-1467
• DOI: 10.1002/jbmte.390030305

✦ Synopsis

Abstract

In the investigation of the redox potential changes of the oxidative fermentation of L‐sorbose to 2‐keto‐L‐gulonic acid, it was found that the 2‐keto‐L‐gulonic acid formation proceeded favourably at low negative redox potential values. Low redox potentials were maintained in a continuous fermentation process in the chemostat, with a resulting high 2‐keto‐L‐gulonic acid formation rate. L‐Tyrosine and some of its analogues stimulated the 2‐keto‐L‐gulonic acid formation. The stimulation seemed to be bound to low redox potential values, and suggested the action of a direct oxidase‐type enzyme.