Hello, Does anyone know of a tool (software or web-based) that can determine codon usage frequency on an entire genome (~50kb) from a genebank file (generated by VectorNTI)? Thanks for any help, -- Don Walthers donwalthers at hotmail.com BS Microbiology U of Illinois at UC, 1996 PhD Microbiology U of Idaho, soon Our gene pool needs a little chlorine.