This document is designed primarily for online viewing. The quality of graphics in this document is inferior to the printed form and may vary considerably, depending on your browser, monitor type and individual printing capabilities. Frequently Asked Questions of Promega's Technical Services Department FAQspeak is a new feature of Promega Notes where we provide answers to frequently asked questions and provide supportive information for readers' specific applications. We routinely are asked whether a specific restriction endonuclease is commercially available . Anderson Timesaving Comparative Guide is an ideal starting point in the search for specific restriction endonucleases.
Enzymes are searchable by name and cut site.
Isoschizomers and neoschizomers are listed, and commercial sources are identified. The appearance of background bands can usually be traced to inappropriate blotting or probing conditions. The secondary antibody is often the source of significant background signals. A sample blot probed with the secondary antibody alone will identify this problem. For specific phone and fax numbers, please refer to the directory on the insert.