Biochemistry and Molecular Biology

ExPASy repository of information relative to the nomenclature of enzymes.

This database contains the known enzyme structures that have been deposited in the Protein Data Bank (PDB).

Peptidases (also termed proteases, proteinases and proteolytic enzymes) and the proteins that inhibit them.

A collection of information about restriction enzymes and related proteins. It contains published and unpublished references, recognition and cleavage sites, isoschizomers, commercial availability, methylation sensitivity, crystal, genome, and sequence data. DNA methyltransferases, homing endonucleases, nicking enzymes, specificity subunits and control proteins are also included.

Data on over 5,000 enzymes: nomenclature, structure, function, isolation, preparation, etc.