Science Advances

Supplementary Materials

This PDF file includes:

  • fig. S1. Experimental and analytical scheme.
  • fig. S2. Mobile phase gradient for the amino acid analyses.
  • fig. S3. HPLC chromatograms of amino acids in the standard solution and the reaction products from the hydrothermal experiments.
  • fig. S4. The 0- to 40-min region of the UPLC-FD chromatograms for the 6 M HCl acid-hydrolyzed reaction product solution from the hydrothermal experiment containing ammonia, formaldehyde, and glycolaldehyde heated at 150°C for 72 hours, the control blank sample, and the amino acid standard solution, measured at NASA JSC.
  • fig. S5. Mass spectra of the OPA/NAC-derivatized amino acids with an m/z of 337.0858 (corresponds to glycine), 351.1015 (alanine), 365.1171 (C4 amino acids; for example, AIB), 367.0964 (serine), 379.1328 (C5 amino acids; for example, valine), 381.112 (threonine), 393.1484 (C6 amino acids; for example, leucine), 395.0913 (aspartic acid), and 409.1069 (glutamic acid).
  • table S1. Wako Amino Acids Mixture Standard Solution (0.1 M HCl).

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