GATA (a Graphic Alignment Tool for Comparative Sequence Analysis)

GATA is a Java application that graphically aligns DNA sequences using the NCBI bl2seq/ BLASTN program. To use GATA, you may need to download and uncompress the blast package (e.g. blast-2.2.6-powerpc-macosx.tar.gz for macOSX) from NCBI (

To align DNA sequences with GATA, first launch GATAliner to create and save the alignment objects. Then launch GATAPlotter to display the alignment. GATAliner will prompt you for the following parameters. All fields must be completed.

File Parameters:

BLASTN Parameters: GATAligner Parameters:
For questions, comments, suggestions, or bug reports contact David Nix ( or the Eisen Lab.