Protein Sequence Analysis.......................................................................545 27.2.1 Protein Data Bank........................................................................545 27.2.2 CATH ...........................................................................................545 27.2.3 SWISS-PROT Database...............................................................546 27.2.4 Prosite ..........................................................................................546 27.2.5 InterPro ........................................................................................547 27.2.6 SCOP — A Database of Structural Classification of Proteins ....547 27.2.7 CluStr Database ...........................................................................548 27.2.8 Homology and Predict 7 ..............................................................548