Fig 4. ¹H-NMR (500.20 MHz, 353 K) of the polysaccharides isolated from YMB culture supernatants of S. fredii HH103 (wt) and its nodD1 and nolR derivatives grown in the absence (-) or presence of genistein (+).

Peaks marked with asterisks correspond to a mannan present in yeast extract, one of the components of YMB medium.