For the use of multi-tungsten clusters in phasing macromolecular assemblies see Thygesen J., Weinstein S., Franceschi F. & Yonath A. (1996) Structure 4:513-518.

Frequency	Compound	Supplier
1	Na₂WO₄	Ac,Al
1	(NH₄)₂WS₄	Af,Al,St

Supplier	Address
Ac	Acros Chemicals; 711 Forbes Ave., Pittsburgh, PA 15219. USA. Tel: (800) 227-6701.
Af	Alfa; Johnson Matthey Catalog Company, Inc. P.O. Box 8247, Ward Hill, MA 01835-0747. USA. Tel: (800) 343-0660
Al	Aldrich Chemical Company1001 West St Paul Ave, Milwaukee, WI 53233. USA Tel: (800) 558-9160.
An	Anatrace Inc.; 434 West Dussel Drive, Maumee, OH 43537-1624 USA. Tel: (800) 252-1280
CS	Chem Service, P.O. Box 3108, West Chester PA 19381-3108. Tel: (610) 692-3026
Fl	Fluka Chemie AG, Industriestrasse 25,CH-9471 Buchs. Switzerland.
Fi	Fisher Scientific, 711 Forbes Ave., Pittsburgh, PA 15219. USA Tel: (800) 766-7000.
I	ICN Pharmaceutical Inc., 3300 Hyland Avenue, Costa Mesa, CA 92626, USA. Tel: (714) 545-0100.
M	Mallinckodt, 470 Frontage Road, West Haven, CT 06516. USA. Tel: (203) 933-7064.
N	Noah Technologies, 1 Noah Park, San Antonio, TX 28249 Tel: (210) 691-2000.
P	Pfaltz & Bauer, 172 E Aurora St., Waterbury, CT. Tel: (203) 574-0075.
Si	Sigma Chemical Company, P.O. Box 14508 St. Louis, MO 63178 USA
Sp	SPECS and BioSPECS bv, Koninginnegracht, 94-95, 2514 AK The Hague THE NETHERLANDS, P.O. Box 85586, 2508 CG The Hague THE NETHERLANDS (mailing address). Tel: 31-70-355-4473 Fax: 31-70-355-8527. [Brandon/SPECS Inc.] (North American sales company), P.O. Box 1244, Merrimack, New Hampshire 03054 U.S.A. Tel: 603-578-2670 Fax: 603-578-2671.
St	Strem Chemical, 7 Mulliken Way, Newburyport, MA 01950 USA. Tel: (508) 462-3191.

Last Modified: December 10, 1996