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Lipid-like soluble organics are synthesized abiotically and have been identified in carbonaceous meteorites and on Mars. Ascertaining the origin of lipids on Mars would be a profound astrobiological achievement. We enumerate origin-diagnostic features and patterns in two acyclic lipid classes, fatty acids (\n                    <jats:italic toggle=\"yes\">i.e.,<\/jats:italic>\n                    carboxylic acids) and acyclic hydrocarbons, by collecting and analyzing molecular data reported in over 1500 samples from previously published studies of terrestrial and meteoritic organics. We identify 27 combined (15 for fatty acids, 12 for acyclic hydrocarbons) molecular patterns and structural features that can aid in distinguishing biotic from abiotic synthesis. Principal component analysis (PCA) demonstrates that multivariate analyses of molecular features (16 for fatty acids, 14 for acyclic hydrocarbons) can potentially indicate sample origin. Terrestrial lipids are dominated by longer straight-chain molecules (C\n                    <jats:sub>4<\/jats:sub>\n                    -C\n                    <jats:sub>34<\/jats:sub>\n                    fatty acids, C\n                    <jats:sub>14<\/jats:sub>\n                    -C\n                    <jats:sub>46<\/jats:sub>\n                    acyclic hydrocarbons), with predominance for specific branched and unsaturated isomers. Lipid-like meteoritic soluble organics are shorter, with random configurations. Organic solvent-extraction techniques are most commonly reported, motivating the design of our novel instrument, the Extractor for Chemical Analysis of Lipid Biomarkers in Regolith (ExCALiBR), which extracts lipids while preserving origin-diagnostic features that can indicate biogenicity.\n                  <\/jats:p>","DOI":"10.1089\/ast.2023.0012","type":"journal-article","created":{"date-parts":[[2023,12,27]],"date-time":"2023-12-27T14:16:10Z","timestamp":1703686570000},"page":"1-35","update-policy":"https:\/\/doi.org\/10.1177\/sage-journals-update-policy","source":"Crossref","is-referenced-by-count":7,"title":["Quantifying Global Origin-Diagnostic Features and Patterns in Biotic and Abiotic Acyclic Lipids for Life Detection"],"prefix":"10.1177","volume":"24","author":[{"given":"Denise K.","family":"Buckner","sequence":"first","affiliation":[{"name":"Department of Geological Sciences, University of Florida, Gainesville, Florida, USA."},{"name":"Blue Marble Space Institute of Science, Seattle, Washington, USA."},{"name":"Space Science &amp; 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