[Chimera-users] Principal axis of inertia
pett at cgl.ucsf.edu
Mon May 18 14:26:06 PDT 2009
On May 15, 2009, at 10:40 AM, Tom Goddard wrote:
> Hi Armida,
> Elaine is right. The atoms are weighted by their mass, carbon counts
> 12 times more than a hydrogen. Isotopic abundances are not considered
> -- I think Chimera's atom.element.mass is just the number of protons
> plus neutrons in the post prevalent isotope.
The mass is the number from the periodic table of the elements --
which is an average across isotopes.
UCSF Computer Graphics Lab
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