ACT is a DNA sequence comparison viewer based on Artemis. The name ACT stands for Artemis Comparison Tool. ACT is written in Java, reads EMBL or GENBANK format sequences and feature tables, and can work on sequences of any size.
The sequence comparison displayed by ACT is usually the result of a blastn or tblastx search that has been processed by MSPcrunch. MSPcrunch must be run with the -d flag for the output to be usable by ACT. See the section called Running a Comparison in Chapter 2 for more on MSPcrunch.
For more information go to the Artemis web pages or the the ACT web pages.