Discover our XP Screen with TEW – the protein crystal glue – and benefit from improved crystal quality and resolution!
Figure adapted from, used by courtesy of Prof. Annette Rompel, University of Vienna, Austria
The Anderson−Evans polyoxotungstate [TeW6O24]6− (TEW) is a universal and flexible additive for protein crystallization. It exhibits a planar structure with six tungsten atoms, being able to improve crystal quality and resolution while providing a valuable anomalous signal for phasing. TEW was shown to:
The XP Screen consists of the 96 most prominent crystallization conditions plus TEW to provide an environment to increase the chances of crystallization and improve crystal diffraction quality.
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 Bijelic et al. (2017) Ten Good Reasons for the Use of the Tellurium-Centered Anderson-Evans Polyoxotungstate in Protein Crystallography. Acc. Chem. Res. 50:1441.
 Molitor et al. (2016) In situ formation of the first proteinogenically functionalized [TeW6O24O2(Glu)]7- structure reveals unprecedented chemical and geometrical features of the Anderson-type cluster. Chem. Commun. 52:12286.
 Bijelic et al. (2015) Hen Egg-White Lysozyme Crystallisation: Protein Stacking and Structure Stability Enhanced by a Tellurium(VI)-Centred Polyoxotungstate. ChemBioChem 16:233.
 Mauracher et al. (2014) Latent and active abPPO4 mushroom tyrosinase cocrystallized with hexatungstotellurate(VI) in a single crystal. Acta Cryst. D 70:2301.