Color Align Conservation accepts a group of aligned sequences (in FASTA or GDE format) and colors the alignment. The program examines each residue and compares it to the other residues in the same column. Residues that are identical among the sequences are given a black background, and those that are similar among the sequences are given a gray background. The remaining residues receive a white background. You can specify the percentage of residues that must be identical and similar for the coloring to be applied. Use Color Align Conservation to enhance the output of sequence alignment programs.