JBS Tungsten Cluster Kits
Heavy atom derivatization of biological macromolecules for isomorphous and/or anomalous phasing methods. Polyoxotungstate clusters have been successfully employed in structural studies because of its high electron-density and very good solubility in aqueous solutions. Three kits available:

• JBS Phosphotungstate Cluster Kit
• JBS Metatungstate Cluster Kit
• JBS Paratungstate Cluster Kit

Tantalum Cluster Derivatization Kits
The huge TaBr cluster gives a very strong SIR, MIR and MAD signal. Stable, soluble, and pre-aliquoted for convenient use.
JBS Halo Kits
Selections of halogenated ATP or GTP derivatives in single kits will enable you to screen them all in parallel. Don't waste time and crystals with a conventional "trial and error" heavy atom screen - get all the material you need for MIR or MAD experiments from one 24 well tray!
JBS Magic Triangle Kit
Three iodines form a triangle that is easily identified in the anomalous electron density maps produced by SAD or SIRAS.
Nucleotides
Halogenated, Mercurated and Selen-containing Nucleotides

NatX-Ray Products: Phasing

NatX-Ray Lanthanide Phasing Compounds
New molecules for anomalous phasing of protein structures. These molecules contain lanthanides and bind tightly to the surface of macromolecules