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Table 2 Comparison of M9 medium and defined artificial seawater medium (DASW) with respect to four main components tested

From: Natural transformation of Vibrio cholerae as a tool - Optimizing the procedure

Component M9 medium* Enriched M9 medium (this study) DASW#
NaCl 9 mM 259 mM 234 mM
HEPES 0 mM 50 mM 50 mM
MgSO4 2 mM 32 mM 27.5 mM
CaCl2 0.1 mM 5.1 mM 4.95 mM
  1. * Sigma; supplemented as recommended by the manufacturer
  2. # As published [8, 9]