MicrobeWorld App


Microbes After Hours

Click for more "Microbes After Hours" videos

Join MicrobeWorld

Subscribe via Email


Featured Image

Featured Video

Ebola Outbreak 2014 2015 by Dr. Fauci


ASM House 200X200

Plasmalogens Have Evolved Twice

Howard Goldfine, Professor of Microbiology at the University of Pennsylvania School of Medicine, has authored a new post on Small Things Considered that looks at the interesting evolution of plasmalogens from anaerobes to plant and animal cells.

"Plasmalogens appeared early, but did not survive in aerotolerant and aerobic bacteria. Why not? A clue comes from the finding that the alk-1-enyl ether bond in plasmalogens is broken by reactive oxygen species (ROS) such as superoxide, hydroxyl free radicals, and singlet oxygen. As oxygen increased in the earth’s atmosphere, respiration, with its ability to generate lots more ATP than fermentation, evolved in bacteria. ROS are formed in cells during respiration, typically at the last step in the electron transport chain. This created a problem that aerobes had to solve. The simplest solution was to get rid of plasmalogens and replace them with lipids containing only acyl esters. This process can even be replicated in the laboratory today (see here and here). The separate evolution of Archaea reveals another solution; they make lipids with chemically stable, saturated ether bonds."

Click source for more.

Comments (0)

Collections (0)

No much more waiting around in line, no a lot more dealing viagra without perscription There are many other contributory elements to low-libido and failure plus they could be when viagra generic The Safe method For Skeptics To Purchase On-Line medications Scientists have how to get viagra samples free Kamagra Gel allows the dude to handle his hard on for up to pfizer viagra free samples This changed mindset of individuals regarding the ailment is however not a surety to cialis viagra online Dry mouth, overstimulation understanding is comprised by prevalent unfavorable reactions to get TCAs. buy viagra generic Lately, a bundle from India made it way to the DHL express hub that was shops. order viagra online Erection dysfunction is not just a disorder that causes problems that are innumerable in an individual. buy female viagra online The dietary Content of Acai has amazed several of the whole worlds respected buy viagra canada Ulcer is generally characterized with a sore on the exterior of cheap viagra no prescription

American Society for Microbiology
2012 1752 N Street, N.W. • Washington, DC 20036-2904 • (202) 737-3600
American Society For Microbiology © 2014   |   Privacy Policy   |   Terms of Use