Portable Analyzer Is Powerful Tool for Detecting Biomarkers of Life on Mars.
Recent observations based on the findings of remote sensing devices and robotic probes that have explored the martian surface suggest that liquid water is, or at least was at some time present on Mars. This has revitalized efforts to search for evidence of extinct or existing life forms. Critical to this effort is the availability of highly sensitive instruments capable of detecting very small quantities of the building blocks or degradation products of microbial life forms.
Alison Skelley, H. James Cleaves, Christine Jayarajah, Jeffrey Bada, and Richard Mathies, from the University of California, Berkeley, and the Scripps Institution of Oceanography at the University of California at San Diego, demonstrated that the microchip capillary electrophoresis (CE)-based Mars Organic Analyzer was able to detect and analyze with high sensitivity a greatly expanded range of target analytes, in a paper entitled, "Application of the Mars Organic Analyzer to Nucleobase and Amine Biomarker Detection."
The authors compared different extraction techniques--including hydrolysis and sublimation--to isolate analytes from bacteria. They utilized fluorescamine labeling to identify amine-containing biomarker compounds, including amino acids, amino sugars, and nucleobases.
"The group's success in applying the MOA to the analysis of a wider variety of organic biomarker compounds is an important advancement of this component of the Urey Instrument, which is being developed for the ESA ExoMars Mission scheduled to launch in 2013," says journal Editor-in-Chief, Sherry L. Cady, Ph.D., Associate Professor in the Department of Geology at Portland State University. To learn more about the groups efforts to find life on Mars, visit their website at http://astrobiology.berkeley.edu.
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