On-line companies and catalogs
Promega
Stratagene
Clonetech
Sigma
Gibco BRL
Boehringer-Mannheim
New England Biolabs
Bio-Rad
Invitrogen
Qiagen
VWR
Fisher
Pharmacia
MBI Fermentas
Novagen
Amersham
BIO-101
Millipore
Flowgen
