Fig. 5: Lipid Biosignature analyses of Red Stone samples.
From: Dark microbiome and extremely low organics in Atacama fossil delta unveil Mars life detection limits
A Lipid content, including normal (i.e. straight chain) alkanes, normal fatty acids, and monounsaturated fatty acids (MUFA) identified by gas-chromatography mass spectrometry (GC-MS). Carbon numbers ranges are indicated in brackets. B Total organic carbon (TOC, % dw) and stable carbon isotopic composition (δ13C, ‰) values found. C, D and E show the samples analyzed through Raman spectroscopy, while (F) shows a positive control in which a lipid was deposited on an amorphous silica-rich substrate (panel F modified with permission from Carrizo et al.89).
