secondary metabolism

[Mozart Marins]

HI there,
    Please, can someone give me a good definition of what is a secondary
metabolism ? A secondary metabolite ? How we diferentiate a primary
metabolism form secondary metabolism ?
    Tkanks,Mozart

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Dr. Mozart Marins			"If there's a God, how do you
Research Assistant			 explain the cockroaches ?"
Dept. Of Pharmaceutical Sciences
FFCFRP-USP - Sao Paulo - Brazil
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