Figure 4

¹³C-NMR spectra of purified N^α-acetyl-α-lysine from S. halodurans H3B36.

(a) Natural abundance; (b) growth with 5 mmol/L ¹³C-labelled aspartic acid; (c) growth with 5 mmol/L ¹³C-labelled lysine. Red represents the ¹³C-labelled carbon in the molecular formula. TMSP was used as the internal reference.