Bioatlas - enzymes that matter
DNA polymerases
http://www.bioatlas.com

Novozymes Biotech, Inc.
Emphasizes research in identifying and engineering new industrial enzymes as well as improving the manufacturing process for new and existing enzymes.
http://www.novozymesbiotech.com/

Specialty Enzymes and Biochemicals Co.
Enzyme blends, applications, and custom made enzyme formulations
http://www.specialtyenzymes.com/

Enzymes
Provides an introduction, for the uninitiated, to enzymes and how they function.
http://users.rcn.com/jkimball.ma.ultranet/BiologyPages/E/Enzymes.html

Deerland Enzymes, Inc
USA. Manufacturers and traders in industrial enzyme products in liquid, granular and spray-dried form. Enzymes for desizing in textile wet processes. Extensive technical information and specifications.
http://www.deerland-enzymes.com/

Fermentas
Molecular Biology Products, including Restriction Enzymes, DNA/RNA Modifying Enzymes, Taq DNA Polymerase, PCR Kits, Molecular Weight Markers and other associated products available from MBI Fermentas. The Catalog also includes an extensive reference section with many useful protocols
http://www.fermentas.com

Using Topology to Probe the Hidden Action of Enzymes
Describes how knot theory is used to understand the action of enzymes that affect DNA topolgy (in pdf format).
http://www.ams.org/notices/199505/sumners.pdf

Enzymotec
AMIET technological platform offers an alternative to more costly and environmentally unfriendly chemical and organic synthesis. Also, enables the use of enzymes in hydrophobic environments and protects the enzymes so as to maintain their innate 3-D structure.
http://www.enzymotec.com/

History of Enzymes
Maps is a pioneer biotechnology company producing enzymes and microorganisms. With over 150 employees, sophisticated production plant and a dedicated R & D centre, we are the India's largest producer and exporter of enzymes and microorganisms; and a leading player in the global market. Our production facilities have been extended from various enzymes like Amylases, Proteases, Cellulases, Xylanase, Glucoamylase, Pectinase, Catalase and Phytase; to different microoganisms using state-of-the-art solid state and submerge culture fermentation from various bacterial and fungal origins. Our enzyme products are used in versatile industries like Textile, Leather, Baking, Alcohol, Brewing, Detergent, Starch and Animal feed. Our microorganisms products are used in various applications for Effluent treatments, Cleaning and odour control, Waste degradation, Bioaugmentation & Bioremediation and Aquaculture.
http://www.mapsenzymes.com/History_of_Enzymes.asp

Maps, Ltd
Maps is a pioneer biotechnology company producing enzymes and microorganisms. Maps is India's largest producer and exporter of enzymes and microorganisms. Our enzyme products are used in versatile industries like Textile, Leather, Baking, Alcohol, Brewing, Detergent, Starch and Animal feed.
http://www.mapsenzymes.com