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Chiral chromatography of aryl-lactic acids (aryl-LAs) and leucic acid (LeuA). The earlier retention time peak is labeled as “1st.” (A) Authentic standards for DL-4-OH-PLA, PLA, and ILA. (B–E) CS samples of B. longum subsp. longum (NITE BP-02621), B. breve (NITE BP-02622), B. adolescentis (ATCC15703T), and B. animalis subsp. lactis (DSM10140T).
