The PLACE database, available at http://www.dna.affrc.go.jp/htdocs/PLACE/, is a comprehensive resource for nucleotide sequence motifs found in plant cis-acting regulatory DNA elements. The database compiles motifs from various plant species and genes, including their variations reported in later studies. Each motif entry includes a unique identifier, accession number, date of update, brief description, keywords, plant species, author, report title, bibliographic information, PubMed and GenBank accession numbers, and the motif sequence. Users can search for motifs using keyword searches, Signal Scan program, or homology searches. The Signal Scan program allows users to identify motifs in query sequences, with results reported in different formats. The database has seen significant growth since its initial release, with 208 entries as of August 25, 1998, and receives approximately 1000 monthly visits. The authors plan to update the database more frequently and include additional information on motif positions and context. Users are encouraged to report any errors or suggest improvements.The PLACE database, available at http://www.dna.affrc.go.jp/htdocs/PLACE/, is a comprehensive resource for nucleotide sequence motifs found in plant cis-acting regulatory DNA elements. The database compiles motifs from various plant species and genes, including their variations reported in later studies. Each motif entry includes a unique identifier, accession number, date of update, brief description, keywords, plant species, author, report title, bibliographic information, PubMed and GenBank accession numbers, and the motif sequence. Users can search for motifs using keyword searches, Signal Scan program, or homology searches. The Signal Scan program allows users to identify motifs in query sequences, with results reported in different formats. The database has seen significant growth since its initial release, with 208 entries as of August 25, 1998, and receives approximately 1000 monthly visits. The authors plan to update the database more frequently and include additional information on motif positions and context. Users are encouraged to report any errors or suggest improvements.