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When should I use stringsearch?

Stringsearch searches through the specified database for a particular character string. You can choose to search through Definitions (option 'A') or Complete Sequence Annotation (option 'B'). The 'A' option is much faster, but both options have been superceded by GCG's Lookup program, which is faster and has more options.

For example, a search through Swissprot for 'glyceraldehyde' takes 25 seconds with Stringsearch Option A, 22 minutes with Stringsearch Option B, and about half a second with Lookup. Lookup searches can also be more easily tailored for your specific needs -- you can search through mouse sequences only, for example. So in most cases, use Lookup instead of Stringsearch.