tail that is shown on the left.
The polyketides are another class of lipids
that are very, very interesting. The polyketides
are typically molecules that are made by organisms
to protect themselves in the environment in
which they reside and also to stake out environment
for them. These molecules that you see on
the screen are made by an organism called
streptomyces. Erythromycin on the left is
an antibiotic and it kills bacteria, it's very
commonly used for this purpose.
Natamycin on the other hand is an antifungal
agent. Now each of these structures looks
very, very complicated, but in fact they have
very, very simple origins. Both of these molecules
are made as by products and derivatives of
the synthesis of fatty acids.
This concludes what I want to say in this
portion of the lecture about the structure
of the basic lipids. There will be another
lecture that will cover other structures of
other lipids and also the way in which all
of these molecules are metabolized.