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07-Feb-2005

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Microbiology: Immortality Dies as Bacteria Show Their Age, Science
 









Excerpts: Biologists already knew that when it comes to aging, all cells are not
created equal. In the 1970s, Kirkwood offered the disposable-soma theory: Cells
of the body, or soma, can deteriorate, but the germ line cells have to take
better care of themselves because they give rise to sperm and eggs. Simple
organisms such as budding yeast engage in a subtler division of labor; aging
yeast parents invest their freshest components in their buds. But biologists
believed that immortality was possible for microbes that divide into
identical-looking daughter cells.
Source: Microbiology: Immortality Dies as Bacteria Show Their Age[
http://www.sciencemag.org/cgi/content/full/307/5710/656a ], Dan Ferber, Science
: 656, 05/02/04

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