Classification of genes in the fruit fly, Drosophila melanogaster
The number
of genes is estimated by identification of open reading frames (ORFs)
and expressed sequence tags (ESTs). Genes are classified
(annotated) by
comparison with known protein sequences from other organisms. In this
2000 catalog, of 11,192
genes classified in Drosophila,
22% are enzymes,12% are involved with regulation of
nucleic acid function, and 68%
have as yet unknown functions.