Fig. 1: Ultraviolet and infrared absorption spectra of aqueous pyruvate.

a UV absorption spectrum of aqueous pyruvate (black) compared to the absorption spectrum of aqueous propionate (red). Insert shows the ground state configuration of pyruvate. b UV absorption spectrum of aqueous pyruvate (black) compared to the absorption spectrum of aqueous acetone (red). IR steady state absorption spectra of pyruvate dissolved in c H2O and d D2O recorded against H2O and D2O references, respectively. Source data are provided as a Source Data file.