E. coli codon usage analyzer

E. coli Codon Usage Analyzer 2.0
by Morris Maduro

Information

This Javascript will take a DNA coding sequence and display a graphic report showing the frequency with which each codon is used in E. coli. The data for this program is from the Class II gene data from Henaut and Danchin: Analysis and Predictions from Escherichia coli sequences in: Escherichia coli and Salmonella, Vol. 2, Ch. 114:2047-2066, 1996, Neidhardt FC ed., ASM press, Washington, D.C.

Instructions

Paste or type the coding sequence into the large textarea below (uppercase or lowercase is fine). Improper characters will be ignored; U can be put in place of T. The 'threshold' is the cutoff to display a different color for a particular codon, and for the tally of 'bad' codons.

Notes:

Be careful entering sequences larger than 750 bp (Javascript may run out of memory). You may have to 'split' larger ORFs.
Computation will take ~10 seconds depending on the platform.
The resulting file can be printed, just set printer to "color/grayscale" mode.