PPMdb: a plant plasma membrane database

PPMdb is a proteome database dedicated to proteins from plant plasma membra nes. It provides comprehensive two-dimensional polyacrylamide gel electroph oresis (2-D PAGE) maps, partial amino acid sequences and expression data. A ll this information is gathered and structured in a relational database, af ter being analyzed and annotated. PPMdb includes active links to related bi ological databases (EMBL, GenBank, GenPep, and SWISS-PROT and TrEMBL) as we ll as to MEDLINE abstracts. Information on specific protein spots can be di splayed by clicking on the 2-D maps. In addition, users can query the datab ase by accession number, protein name, pi and MW, and cellular location. Ac cess to PPMdb is available at the following URL: http://sphinx.rug.ac.be:80 80. (C) 2000 Elsevier Science B.V. All rights reserved.