The complete genome sequences for human, Drosophila melanogaster and Arabid
opsis thaliana have been reported recently. With the availability of comple
te sequences for many bacteria and archaea, and five eukaryotes, comparativ
e genomics and sequence analysis are enabling us to identify counterparts o
f many human disease genes in model organisms, which in turn should acceler
ate the pace of research and drug development to combat human diseases. Con
tinuous improvement of specialized protein databases, together with sensiti
ve computational tools, have enhanced the power and reliability of computat
ional prediction of protein function.