[Chimera-users] Principal axis of inertia
gregc at cgl.ucsf.edu
Mon May 18 14:42:15 PDT 2009
On Mon, 18 May 2009, Eric Pettersen wrote:
> 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.
More explicitly, the atom's mass is the "standard atomic weight" as given
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