● Calpain Research Portal: http://calpain.net/

● Calpain Data Base "CaMP DB" (Collaboration with Prof. Hiroshi Mamitsuka (Kyoto Univ.), Dr. Ichigaku Takigawa (Hokkaido Univ.), and Dr. Dave duVerle (AIST）: http://calpain.org/

● Calpain Pages at Univ. of Arizona: http://ag.arizona.edu/calpains/

● The EF-Hand Calcium-Binding Proteins Data Library： http://structbio.vanderbilt.edu/cabp_database/

　　Calpain pages at the above site

● Handbook of Proteolytic Enzymes, Three-Volume Set with CD-ROM (Volume 1-3), Third Edition: Elsevier

● Encyclopedia of Biological Chemistry, Four-Volume Set, Second Edition: Elsevier

● Enzyme nomenclature database： http://kr.expasy.org/enzyme/

● MEROPS peptidase database： http://merops.sanger.ac.uk/

● Portal Site for Muscular dystrophies by Dr. Ikuya Nonaka (in Japanese): http://www.ncnp.go.jp/network/sinkei/sikkan.htm

● Leiden Muscular Dystrophy Pages (Center for Human and Clinical Genetics, Leiden University Medical Center)： http://www.dmd.nl/

　　CAPN3/calpain-3/p94 pages at the above site

● CutDB: http://cutdb.burnham.org/