Fig. 4From: Enhancement of bleomycin production in Streptomyces verticillus through global metabolic regulation of N-acetylglucosamine and assisted metabolic profiling analysisStatistical analysis of intracellular metabolites data measured by GC–MS. Samples were collected at 48 h, 84 h and 108 h for a comparison between medium I and medium II. a PCA- derived loading plots. b PLS-derived loading plots. Samples from medium I and medium II were inside the black and orange dashed ellipses, respectively. c PLS-derived VIP plots with 26 metabolites with VIP values exceeding 1. GlcNAc, N-acetylglucosamine; PGAL, glyceraldehydes 3-phosphate; GMS, glycerol monostearateBack to article page