Targeted gene deletions for polysaccharide slime formers

摘要

The present invention provides improved polysaccharides (e.g., gellan and diutan) produced by mutant gene R Sphingomonas strains containing at least one genetic modification that favors slime-forming polysaccaride production. Methods of making the mutant Sphingomonas strains and the culture broth containing such mutant Sphingomonas strains are also provided.