Sources of C30 steroid biomarkers in Neoproterozoic–Cambrian rocks and oils

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Fig. 1: Comparison of C30 sterane distributions obtained from hydrogenation of a demosponge (R. distincta) versus protists (C. reptans and A. lobifera).

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The authors declare that the data supporting the findings of this study are available within the paper and/or the cited references.

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Acknowledgements

Funding support for this work came from the NASA Astrobiology Institute teams (NNA15BB03A) Alternative Earths and (NNA13AA90A) Foundations of Complex Life, as well as from the NASA Exobiology programme (grant number 80NSSC18K1085 to G.D.L.) and additionally, from European Union’s Horizon 2020 research and innovation programme through the SponGES project (grant agreement number 679849). We are grateful to X. Cui for conducting GC–QQQ-MS analyses at MIT.

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J.A.Z. and G.D.L. performed the MRM GC–MS analyses at UC Riverside and wrote the manuscript in collaboration with R.E.S. J.A.Z., G.D.L. and R.E.S. interpreted the lipid biomarker data. P.C., E.A.S., M.R., E.G. and J.P.G. provided comments and edits on drafts of the manuscripts.

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Correspondence to Gordon D. Love.

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Love, G.D., Zumberge, J.A., Cárdenas, P. et al. Sources of C30 steroid biomarkers in Neoproterozoic–Cambrian rocks and oils. Nat Ecol Evol 4, 34–36 (2020). https://doi.org/10.1038/s41559-019-1048-2

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