Fig. 3From: Production of (2R, 3R)-2,3-butanediol using engineered Pichia pastoris: strain construction, characterization and fermentationGC profiles of metabolites in different strains. a GC profile of standards. Retention times: 3S-acetoin, 3.8 min; 3R-actoin, 4.0 min; (2S, 3S)-2,3-BD, 6.4 min; (2R, 3R)-2,3-BD, 6.5 min; meso-2,3-BD, 6.8 min. b GC profile of extract of culture of X33-SD. c GC profile of extract of culture of X33-SDB. d GC profile of extract of culture of X33-SDUBack to article page