A U.S. Patent for “Enhanced Fermentation” was awarded to BASF on June 9th, 2020. The present invention is a method for protecting a microbially produced substance against oxidation, comprising a) providing a microorganism capable of producing said substance, the microorganism comprising, as a heterologous gene, a catalase gene encoding i) a catalase having at least 90% amino acid sequence identity to SEQ ID NO: 1, or ii) a fragment of the catalase according to i), wherein the fragment has catalase activity, and b) cultivating the microorganism under conditions such that said catalase gene is expressed and said substance is produced… Learn More