Lobry, J.R., Gautier, C. (1994) Hydrophobicity,
expressivity and aromaticity are the major trends of amino-acid usage in
999 Escherichia coli chromosome-encode genes. Nucleic Acids
Research,22:3174-3180.To have an overview of the seqinR's functionnality, please consult this vignette:
Charif, D., Lobry, J.R. (2005) SeqinR: a contributed package to the R project for statistical
computing devoted to biological sequences retrieval and analysis. Springer Verlag, Biological and Medical Physics/Biomedical Series, in preparation.