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TLC developed with 5:5:1 ethyl acetate:acetonitrile:water showing colored materials isolated from bacterial fermentations with S. venezuelae ISP5230 (wt) and S. venezuelae VS678 in the presence of d-serine. Co refers to the co-spot where material from both wt and VS678 strains were spotted. JdDS, the major product, is indicated with an arrow.
