jcclark-lists at EARTHLINK.NET
Fri Jan 14 20:28:28 CST 2005
on 2005-01-14 19:42 Robin Leech wrote:
> There has been no selection for a faster
> enzyme in nature cuz it is not needed.
Not exactly true--PEP carboxylase does the job much better and is the
basis of CAM and C4 photosynthesis, but it has no metabolic hooks to the
Calvin cycle, so all it can do is store CO2 to later overwhelm RuBisCO
(following the employment model, PEP carboxylase is the super-efficient
administrative assistant to the boss's nephew, keeping his inbox full).
Curtis Clark http://www.csupomona.edu/~jcclark/
Web Coordinator, Cal Poly Pomona +1 909 979 6371
Professor, Biological Sciences +1 909 869 4062
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