On Wednesday 01 April 2009 07:21:16 Thomas Womack wrote:
> A perusal of the PDB reveals that the game of Periodic Table bingo still
> has eleven rounds to run:
>
> scandium, titanium, germanium, zirconium, niobium, neodymium,
> dysprosium, thulium, hafnium, bismuth and thorium remain absent from PDB
> entries.
Does this imply that there is a PDB entry containing Radon?
I can't find any such entry, but then again I have never had much
luck with the search tools on www.pdb.org
Ethan
> OK, many of these are elements that would rather be refractory oxides or
> jet-engine components than hexammines, and niobium chloride clusters
> don't seem to be as water-stable as Ta6Br14, but why have neodymium,
> dysprosium and thulium so consistently been left out there in the cold
> rather than admitted to the warmish embrace of carboxyl groups? There
> must somewhere be a protein with a site that cries out for ThCl2(2+), an
> unexpectedly water-stable cation.
>
> Tom
>
--
Ethan A Merritt
Biomolecular Structure Center
University of Washington, Seattle 98195-7742
