Figure 1From: Conversion of orange peel to L-galactonic acid in a consolidated process using engineered strains of Aspergillus nigerThe catabolic D-galacturonic acid pathway in A. niger . The enzymes of this pathway are D-galacturonic acid reductase (GAAA), L-galactonate dehydratase (GAAB), 2-keto-3-deoxy-L-galactonate aldolase (GAAC) and L-glyceraldehyde reductase (GAAD). The strains used in the present work were engineered to have no GAAB activity.Back to article page