This updated and expanded Second Edition of The Adhesion Molecule Facts Book has nearly double the number of entries of the First Edition, and provides a compendium of the major cell surface adhesion molecules. The introductory chapters detail the organization of the data in the entries section, provide a background to the main adhesion molecule families, and inform the reader how to access information on adhesion molecules on the Internet. The entries have been designed to allow the reader to quickly establish the main structure and functional features of each molecule and where to find information. – Alternative nomenclature- Tissue distribution and regulation of expression- Ligands- Gene organization and chromosomal location- Protein structure and molecular weights- Amino acid sequence of the most commonly studied organisms- PIR, SWISSPROT, and EMBL/Gen Bank accession numbers- Biological function- Key references