Fig. 2 | Nature Communications

Fig. 2

From: Selective prebiotic conversion of pyrimidine and purine anhydronucleosides into Watson-Crick base-pairing arabino-furanosyl nucleosides in water

Fig. 2

Prebiotic synthesis of arabino-adenosine (ara-4A). 1H NMR spectra (600 MHz, 9:1 H2O/D2O, 25 °C, δ = 5.5–9.0 ppm) showing: a anhydroadenosine (3A; red). b Crude 8-mercapto-arabino-adenosine (ara-5A; blue) observed upon incubation of anhydroadenosine (3A; 35.7 mM) and H2S (670 mM, 60 °C, 7 d, pH 7). c Crude arabino-adenosine (ara-4A; purple) after irradiation (λ = 300 nm) of 8-mercapto-arabino-adenosine (ara-5A; 2 mM, room temperature, 16 h, pH 7)

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