ExInt: an Exon/Intron database

The Exon/Intron (ExInt) database incorporates information on the exon/intro n structure of eukaryotic genes. Features in the database include: intron n ucleotide sequence, amino acid sequence of the corresponding protein, posit ion of the introns at the amino acid level and intron phase. From ExInt, we have also generated four additional databases each with ExInt entries cont aining predicted introns, introns experimentally defined, organelle introns or nuclear introns, ExInt is accessible through a retrieval system with po inters to GenBank, The database can be searched by keywords, locus name, NI D, accession number or length of the protein. ExInt is freely accessible at http://intron.bic.nus.edu.sg/exint/ exint.html.