SRS is the sequence retrieval system developed by EBI.DDBJ modified it for DDBJ databases and made available this system. Target database - sequence database : DDBJ, DDBJNEW, DAD, SWISSPROT, PIR - sequence-related database: PROSITE, PROSITEDOC, ENZYME - protein tertiary structure database: PDB The URL is http://ftp2.ddbj.nig.ac.jp:8000/srs/ .This has a link from [Database Searches and Data Analyses] of DDBJ Home Page.