L. L. Jahnke
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View article: Enabling Data Discovery with the Astrobiology Resource Metadata Standard
Enabling Data Discovery with the Astrobiology Resource Metadata Standard Open
As scientific investigations increasingly adopt Open Science practices, reuse of data becomes paramount. However, despite decades of progress in internet search tools, finding relevant astrobiology datasets for an envisioned investigation …
View article: New microbial sources of 2- and 3-methylhopanoids from anoxic, acidic, sulfidic hydrothermal springs
New microbial sources of 2- and 3-methylhopanoids from anoxic, acidic, sulfidic hydrothermal springs Open
<p>Biomarkers are membrane lipids that can record microbial inputs to the sedimentary rock record and can provide a longstanding record of microbial life on Earth. Hopanoids, cyclic triterpenoid membrane lipids, are some of the most …
View article: Community Report from the Biosignatures Standards of Evidence Workshop
Community Report from the Biosignatures Standards of Evidence Workshop Open
The search for life beyond the Earth is the overarching goal of the NASA Astrobiology Program, and it underpins the science of missions that explore the environments of Solar System planets and exoplanets. However, the detection of extrate…
View article: Genomic Features of the Bundle-Forming Heliobacterium Heliophilum fasciatum
Genomic Features of the Bundle-Forming Heliobacterium Heliophilum fasciatum Open
Eight species of heliobacteria have had their genomes sequenced. However, only two of these genomes have been analyzed in detail, those from the thermophilic Heliomicrobium (Hmi.) modesticaldum and the alkaliphilic Heliorestis (Hrs.) convo…
View article: Anaerobic 3-Methylhopanoid Production By An Acidophilic Phototrophic Purple Bacterium
Anaerobic 3-Methylhopanoid Production By An Acidophilic Phototrophic Purple Bacterium Open
Bacterial lipids are well preserved in ancient rocks and certain ones have been used as indicators of specific bacterial metabolisms or environmental conditions existing at the time of rock deposition. Here we show that an anaerobic bacter…
View article: Abzu: Uncovering the Origin of Ancient Organics on Mars
Abzu: Uncovering the Origin of Ancient Organics on Mars Open
I. Ancient Mars is a key target for life-detection missions.Identifying evidence of ancient Martian life would revolutionize our understanding of terrestrial biological processes and predictions for the likelihood of life elsewhere in the …
View article: Protein Stable Isotope Fingerprinting (P-Sif): Chocolate Pots (Yellowstone) Biomass
Protein Stable Isotope Fingerprinting (P-Sif): Chocolate Pots (Yellowstone) Biomass Open
Stable carbon isotope data for proteins extracted from a Yellowstone microbial mat, Chocolate Pots hot springs.