Fig 1.

Cultured B. longum 105-A(pKKT427 or pBCAT001) under aerobic or anaerobic conditions. (A) Growth (OD₆₆₀) of the cultured B. longum 105-A strain. (B) Counts of B. longum 105-A cultured under aerobic conditions. (C) LIVE/DEAD (L/D) assay of B. longum 105-A cultured under aerobic conditions. (D) H₂O₂ accumulation by B. longum 105-A cultured under aerobic conditions. Dotted line, B. longum 105-A(pKKT427); solid line, B. longum 105-A(pBCAT001); solid circles, B. longum 105-A(pKKT427) cultured under aerobic conditions; open circles, B. longum 105-A(pBCAT001) cultured under aerobic conditions; solid triangles, B. longum 105-A(pKKT427) cultured under anaerobic conditions; open triangles, B. longum 105-A(pBCAT001) cultured under anaerobic conditions; solid squares, B. longum 105-A(pKKT427) cultured using exogenously added catalase (3,000 U/ml medium) under aerobic conditions; open squares, B. longum 105-A(pKKT427) cultured using exogenously added catalase (100 U/ml medium) under aerobic conditions. The results presented correspond to the averages of three different assays. Error bars correspond to the standard errors of the mean values.