CARBOHYDRATES

 GLYCAM (Robert J. Woods, Complex Carbohydrate Research Center, University of Georgia, U.S.A.) - this site has tools which allow one to answer the following questions: What are the shapes of my glycan?
What glycans bind to my protein? How does my antibody recognize its glycan antigen? How does glycosylation affect my protein?  And, to Search for glycans in the PDB.

 CSDB (Carbohydrate Structure Database) was merged from Bacterial (BCSDB) and Plant&Fungal (PFCSDB) databases. CSDB contains manually curated natural carbohydrate structures, taxonomy, bibliography, NMR, and other data  literature. (Reference: Ph.V. Toukach & K.S Egorova. Nucleic Acids Res (Database Issue) 44(D1): D1229-D1236).

 Glycosciences.de - provides bioinformatics tools for glycobiology and glycomics:

 Glycofragment - calculates and displays the main fragments (Band C-, Z- and Y-, A- and X-ions) of oligosaccharides that should occur in MSspectra.   

 LiGraph - generates schematic drawings of oligosaccharides which are often used to display glycan structure. 

 pdb2linucs - automatically extracts carbohydrate information from pdb-files and displays it using the LINUCS-Code.    

 LINUCS - LInear Notation for Unique description of Carbohydrate Structures  
 
 GlySeq - provides statistical analyse the sequences around glycosylation sites.    

 GlyTorsion - performs a statistical analysis of carbohydrate torsion angles derived from the Protein Data Bank.  
 
 GlyVicinity - generates statistics about the amino acids present in the vicinity of carbohydrate residues.  

 carp - generates Ramachandran-like plots of carbohydrate linkage torsions in pdb-files.  
 
 pdb-care - checks carbohydrate residues in pdb-files for errors.

 ChemSpider - is a free chemical structure database providing fast access to over 100 million structures, properties, and associated information. By integrating and linking compounds from hundreds of high-quality data sources, ChemSpider enables researchers to discover the most comprehensive view of freely available chemical data from a single online search. It is owned by the Royal Society of Chemistry.

 Chem-Space - uses Marvin JS from Chemaxon to draw chemical structures  Once done you can search in their database (1.8 billion chemicals) for a chemical with an exact match, it substructure, or any similar structure.