CodonCode's TraceViewer CodonCode's TraceViewer See Phred Run. See Phred Qualities. CodonCode 's TraceViewer is a Java program that allow you to see DNA sequencing traces . If the traces were processed with Phred and therefore contain base call qualities, TraceViewer allows you to see Phred quality values .
Display traces on white or black background.
Display Phred quality values as bars or numbers with one of three different color schemes . Available for Windows, Macintosh, and Unix computers. TraceViewer is free for academic users .