In this case, I agree with you.
Many molecules interact with different receptor sites.
That's why a drug which is used for one medical condition
also causes many side effects. A billion different
parts (or what we say, moieties,) of a molecule
could look like something else to a receptor. Finding
some theoretical molecules interacting with a theoretical
receptor is not very specific...for some reason, people
seem to forget that molecules and simple chemicals are
in equilibrium with the different conformations that
they can achieve, so if they're bent one way, they may
look like a different molecule (or be able to bind with
a receptor that it usually doesn't at a high rate)
I think some people think that molecules are little
balls hooked up at certain areas, and never break up,
or never change their conformation, or neither interact
with other items in their very near environment..
The 3-D animations they show usually show much less of the congestion and possible interactions going
on in that tiny space...
ping