Fig. 8. Natural abundance ¹³C-NMR spectra of ethanolic cell extracts. H.salinarum strain S9 was grown at 4 M NaCl in complex medium (A), synthetic medium (B) or synthetic medium supplemented with 10 mM glycine betaine (C). Resonances for l-glutamate (A and B) and glycine betaine (C) are indicated by carbon numbers as assigned in the structural formulae.