Gel Scanners

I disagree with the evaluation of gel scanner systems in the Oct. 4, 1993, issue of The Scientist [C.D. Potter, page 18]. The article states that gel scanners are "expensive" when compared to gel documentation systems. This statement is potentially misleading.

The article does not distinguish between gel documentation systems, which primarily perform one function, and gel scanners, which may perform a wide range of functions, including analysis, databasing, and documentation.

Dedicated gel documentation systems may be the best choice for labs that need only documentation. But for labs that need documentation and analysis, a gel scanner system with documentation capabilities may be a cost-effective option.

If you wanted to focus on only one type of system, you should have either omitted reference to gel scanners or explained how the systems are used for other applications. Dismissing the systems as merely "expensive" is a disservice to readers.

GREG HOFF
Millipore...