Artemis is a DNA sequence viewer and annotation tool that allows visualisation of sequence features and the results of analyses within the context of the sequence, and its six-frame translation. Artemis is written in Java, reads EMBL or GENBANK format sequences and feature tables, and can work on sequences of any size. ACT (Artemis Comparison Tool) is a DNA sequence comparison viewer based on Artemis. It can open two or more sequences (and their annotations/features) together with their comparisons (usually the result of running blastn or tblastx searches). WWW: http://www.sanger.ac.uk/Software/Artemis/manual WWW: http://www.sanger.ac.uk/Software/ACT/manual