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The growth curves of B. longum-pBV22210-IL-2 and wild-type (WT) B. longum cells. B. longum-pBV22210-IL-2 cells were incubated anaerobically at 37°C in trypticase-peptone-yeast (TPY) medium with or without chloramphenicol. WT B. longum cells were incubated anaerobically at 37°C in TPY medium without selective pressure. OD 600, optical density at 600 nm.
