Barrett,Alan J. <br/><br/>
Methods in Enzymology,Volume 248,Proteolytic Enzymes  Aspartic and Metallo Peptidases 

 - London  Academic Press Inc.  1995 
 - 873p. 
<br/><br/><label>ISBN: </label>0121821498 
<br/><br/><label>Dewey Class. No.: </label>574.1925  / B27P