Fig. 4From: High tetramethylpyrazine production by the endophytic bacterial Bacillus subtilis isolated from the traditional medicinal plant Ligusticum chuanxiong Hort.GC chromatograms of the fermentation broth sample. a chromatograms of the authentic compounds TMP, b chromatograms of the authentic compounds HB, c fermentation broth samples of the blank group, d fermentation broth samples of LB5Back to article page