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A specific 4641Da amino acid polymer entity is present in two CV3 meteoritesAcfer 086 and Allende, together with its breakdown polymer fragments of mass <2000Da. Previously in Allende and Murchison meteorites we had detected polymeramide of mass < 2000Da using a new method based on Folch extraction of micronmeteoritic particles with hydrophilic and hydrophobic phases. Low temperatureextraction kept polymer amide intact whereas previous methods had resulted indegradation via boiling the samples. Acfer 086 and Allende polymer amidecomposition was predominantly glycine with partial content of hydroxy-glycineand alanine. Detection was via matrix-assisted laser desorption time-of-flightmass spectrometry (MALDI/TOF/MS). Amino acid analysis showed that the aminoacids present were almost entirely bound in polymers prior to acid hydrolysis.Fragment analysis provided a possible subunit structure for the 4641 species.In the Allende polymer fragment data heavy isotope satellite enhancementconfirmed an extraterrestrial origin that could be in the interstellar mediumor the protoplanetary disc. The dominance of 4641Da polymer amide suggested areplication or concentration mechanism. Analysis of the infrared modes of aproposed structure showed a peak in collective mode intensity at 20 residuelength, giving a possible explanation in terms of optimized energy absorptionfor the dominance of this size of linear glycine-based structure.

A 4641Da polymer of amino acids in Acfer 086 and Allende meteorites