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Analysis of microbial lipids deposited on Mars Global Simulant (MGS-1) by geomatrix-assisted laser desorption/ionization-mass spectrometry

Published online by Cambridge University Press:  07 April 2021

Alef dos Santos Open the ORCID record for Alef dos Santos [Opens in a new window] ,
Edson Rodrigues-Filho  and
Manoel Gustavo Petrucelli Homem Open the ORCID record for Manoel Gustavo Petrucelli Homem [Opens in a new window]
Alef dos Santos*
Affiliation:
Laboratório de Bioquímica Micromolecular de Micro-organismos (LaBioMMi), Departamento de Química, Universidade Federal de São Carlos, São Carlos, 13565-905, SP, Brazil
Edson Rodrigues-Filho
Affiliation:
Laboratório de Bioquímica Micromolecular de Micro-organismos (LaBioMMi), Departamento de Química, Universidade Federal de São Carlos, São Carlos, 13565-905, SP, Brazil
Manoel Gustavo Petrucelli Homem
Affiliation:
Laboratório de Colisões Eletrônicas e Fotônicas (LCEF), Departamento de Química, Universidade Federal de São Carlos, 13565-905São Carlos, SP, Brazil
*
Author for correspondence: Alef dos Santos, E-mail: alef@estudante.ufscar.br
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Abstract

Lipids are among the organic substances that can work as biosignatures, indicating life in an environment. We present an experimental investigation concerning analysis of lipids from a microbial source deposited on the Mars Global Simulant (MGS-1) regolith by geomatrix-assisted laser desorption/ionization-mass spectrometry (GALDI-MS). Our results indicate that lipids from intact microbial cells of a black yeast strain can be detected in these mimetic samples of Martian soil. These lipid molecules are predominantly associated with the occurrence of adducts in the GALDI-MS spectra. The results can be helpful in the planning of future planetary missions.

Keywords

Biosignaturesblack yeastGALDIgeomatrixlipidsMarsmolecular biomarkers
Type
Research Article
Information
International Journal of Astrobiology , Volume 20 , Issue 3 , June 2021 , pp. 234 - 240
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Copyright
Copyright © The Author(s), 2021. Published by Cambridge University Press

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