Figure 6From: Investigating xylose metabolism in recombinant Saccharomyces cerevisiae via 13C metabolic flux analysis13C enrichment of proteinogenic amino acids in S. cerevisiae strains cultured in A) defined minimal medium and B) YPAX medium. Note: the mass spectrum of Asp, Glu and Phe in CF3 strain cultured in YPAX medium had too much noise to derive the reliable readouts of 13C enrichment.Back to article page