Fop (frequency of optimal codon usage): WWW service with its distribution analysis

Y. Nakamura (
T. Ikemura (

National Institute of Genetics and The Graduate University for Advanced Studies,
Yata 1111, Mishima, Shizuoka 411 Japan


We have been constructing a WWW server which shows: 1) Fop value for all of the full-length ORFs of E. coli and S. cerevisiae in GenBank DNA sequence database and 2) distribution of Fop value along the chromosomes. A program available on the server allows to calculate a Fop value for a sequence of these species.