14 September 2006 On the Maillard reaction of meteoritic amino acids
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Abstract
We have performed the Maillard reaction of a series of meteoritic amino acids with sugar ribose under simulated prebiotic conditions, in the solid state at 65°C and at the room temperature. Many meteoritic amino acids are highly reactive with ribose, even at the room temperature. We have isolated high molecular weight products that are insoluble in water, and have studied their structure by the IR (infrared) and solid-state C-13 NMR (nuclear magnetic resonance) spectroscopic methods. The functional groups and their distribution were similar among these products, and were comparable to the previously isolated insoluble organic materials from the Maillard reaction of the common amino acids with ribose. In addition, there were some similarities with the insoluble organic material that is found on Murchison. Our results suggest that the Maillard products may contribute to the composition of the part of the insoluble organic material that is found on Murchison. We have also studied the reaction of sodium silicate solution with the Maillard mixtures, to elucidate the process by which the organic compounds are preserved under prebiotic conditions.
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Vera M. Kolb, Milica Bajagic, Patrick J. Liesch, Ajish Philip, George D. Cody, "On the Maillard reaction of meteoritic amino acids", Proc. SPIE 6309, Instruments, Methods, and Missions for Astrobiology IX, 63090B (14 September 2006); doi: 10.1117/12.680747; https://doi.org/10.1117/12.680747
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