Cell Wall web sites:
  Expansin Proteins and Genes at PSU.
This is the primary site for information about expansins.
  Cellulose Synthase Genes at Standford.
Sequence information for several gene families related to plant cell wall biosynthesis, including CESA and Callose Synthases/Glucan Synthases. It also published some Perl scripts for molecular biology and sequence analysis.
  CAZy at France
A very useful site which contains the families of structurally-related catalytic and carbohydrate-binding modules (or functional domains) of enzymes that degrade, modify, or create glycosidic bonds.
  Complex Carbohydrate Research Center at University of Georgia 
Contains NMR spectra of oligasaccharides and GC-EIMS of Partially Methylated Alditol Acetates databases. Provides custom synthesis and analysis of complex carbohydrates service.
  Analysis of Rice CSL Genes by Dr. Jonathan Walton at MSU. 
Holds research information on cell wall degrading enzymes, cell wall biosysthesis, host selective toxins, histone Deacetylases and more...
  Plant Cell Walls 
A useful site with abundant information about the components that constitute plant cell walls, information about the research programs at the CCRC and links to other cell wall resources.
  Cell Wall Genomics
A web site that describes the activities of an NSF-funded research program aimed at identifying useful mutants in cell wall metabolism
  XTH World
This is the primary web site for information about XTH's
  Cell Wall Navigator
An integrated database for protein families involved in plant cell wall metabolism
Databases:
  The Arabidopsis Information Resource(TAIR)
Provides a comprehensive resource for the scientific community working with Arabidopsis thaliana.
  The TIGR Arabidopsis thaliana Database 
Contains a collection of information on Arabidopsis genome research.
  MIPS(Munich Information Centre for Protein Sequences)
Contains Arabidopsis, Yeast, Human and Neurospora Genome Database.
  Embryo-Defective Mutants of Arabidopsis the Meinke Collection
Presents the information of approximately 250 embryo-defective mutants of Arabidopsis isolated and characterized in the Meinke lab.
  Arabidopsis Genome Resource at UK
Provides sequence information (both nucleotide and protein) and software tools for comparative mapping.
  Genbank
The NIH genetic sequence database, an annotated collection of all publicly available DNA sequences.
  SWISS-PROT
A curated protein sequence database which strives to provide a high level of annotations, a minimal level of redundancy and high level of integration with other databases
  Computational Biology Centers at Univ. of Minnesota
Contains cDNA sequence analysis software tools for plant species including Arabidopsis, Rice and Maize.
Biomedical research suppliers sites:
  Calbiochem-Novabiochem Corp
Provides biochemicals and immunochemicals to life science researchers in academia, biotechnology, and pharmaceutical industry. Specializes in providing products for signal transduction, protein chemistry, and glycobiology
  Sigma-Aldrich
Develops, manufactures and distributes the broadest range of high quality biochemicals, organic chemicals, chromatography products and diagnostic reagents.
  BioSupplyNet
Tell you where to find biomedical research supplies. It features the latest catalogs and product literature from many different suppliers.
  Biosupplies Australia PTY Ltd
Provides reagents for detection, characterisation, and quantification of polysaccharides and proteoglycans from plant cell surfaces and secretions.
Others:
  Cold Spring Harbor Laboratory Arabidopsis Genome Analysis
Contains mapping and sequencing on Chromaosome V and VI and AtRepBase, a database of sequences repeated in the Arabidopsis genome.
  Plant Genome Research Program at NSF List plant genome project web sites.
  ARS(Agricultural Research Service) Genome Database Resource at Cornell For communication of Plant Genome data among scientists. Genome databases include data about plant genes, chromosome maps, DNA fingerprints, beneficial traits, and crop varieties that possess those traits.
  Biotechnology Patents 
A fairly extensive bibliography of articles and monographs related to Biotechnology patents.
Newsgroups:
  news:bionet.genome.arabidopsis
  http://www.bio.net/hypermail/ARABIDOPSIS/