3.4.22.53	recombinant enzyme	643968, 644028, 644029	
3.4.22.53	recombinant wild-type and mutant enzymes	644019	
3.4.22.53	single-step purification of calpain-1, calpain-2, and calpastatin using anion-exchange chromatography	754631	
3.4.22.53	wild-type and mutant calpains	644019