Astrid Sigel & Helmut Sigel 
Metals Ions in Biological System [PDF ebook] 
Volume 39: Molybdenum and Tungsten: Their Roles in Biological Processes:

Volume 39: Molybdenum and Tungsten: Their Roles in Biological Processes is devoted soley to the vital research area on molybdenum and tungsten and their role in biology. It offers a comprehensive and timely account of this fascinating topic by 40 distinguished international authorities. Topics include: transport, homeostasis, regulation and binding of molybdate and tungstate to proteins, crystallographic characterization, coordination of complexes, and biosynthesis.