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Actually, if you want to feel really good, I learned (in the context of optics) that you can resolve two points separated by a distance x with a diffraction limit of x/0.7, so this means you can start to see carbon - carbon atomicity at 2.2 Å. On May 15, 2008, at 10:12 AM, Gloria Borgstahl wrote: > To me, it seems legal to use the words "atomic resolution" once we > are within the carbon-carbon bond length. So I'm agreeing with Dr. > Scott. > Otherwise I'll never get to use the words... > > ****************************************************************************** > Gloria Borgstahl > Eppley Institute for Cancer Research and Allied Diseases > 987696 Nebraska Medical Center > 10732A Lied Transplant Center > Omaha, NE 68198-7696 > > http://sbl.unmc.edu > Office (402) 559-8578 > FAX (402) 559-3739 > > Associate Professor > Hobbies: Protein Crystallography, Cancer, Biochemistry, DNA > Metabolism, > Modulated Crystals, Crystal Perfection, X-ray Topography, > Interests: ThimbleTack, skateboarding, RAGBRAI, and rollerskating > ****************************************************************************** > > > > William Scott <[log in to unmask]> > Sent by: CCP4 bulletin board <[log in to unmask]> > 05/15/2008 12:09 PM > Please respond to > William Scott <[log in to unmask]> > > > To > [log in to unmask] > cc > > Subject > Re: [ccp4bb] poll: cutoff for "high resolution" > > > > > > > On May 15, 2008, at 10:01 AM, Ed Pozharski wrote: > >> 1.2A (not surprisingly since this is about the length of covalent >> bond). > > A carbon-carbon single bond is about 1.55 Å.