Data files

. L. lactis (NZ9000), E. faecalis (V538) and S. pyogenes (M49) wild type strain and their ldh- mutants were grown in batch cultures at 37°C in anaerobic 96 wells plates in either TH-broth supplemented with 0.5% (w/v) yeast (THY) or a chemically defined medium for LAB (pH 7.4) (CDM-LAB (10)). Both media were buffered with either 100 mM MES buffer or 100 mM MOPS buffer for growth at pH 6.5 and 7.5 respectively.

S. pyogenes was grown in C-limited cultures at pH 6.7 and 7.5 and at a growth rate of 0.05 and 0.15

E. faecalis was grown in C-limited cultures at pH 6.7 and 7.5 and at a growth rate of 0.05 and 0.15

L. lactis was grown in C-limited cultures at pH 6.7 and 7.5 and at a growth rate of 0.05, 0.15 and 0.40