Concentration of CPC and beta-lactam biosynthesis intermediates in the culture broth were determined in the CTAB/ acetonitrile/ orthophosphoric acid/ water mobile phase on a YMC-Pack ODS-A chromatographic column (“YMC CO.”, Japan) with a particle diameter of 5 μm at a flow rate of 1.0 ml/ min of the mobile phase, detection 254 nm.
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