KEUTMANN et al. V. GILLIGAN et al. OHSUYE et al. - Page 6




          Interference No. 102,700                                                    


          admission, there is a need to screen a large number of                      
          potential sources, by species and tissue type, in order to                  
          identify a suitable source of PAM enzyme.  Moreover, according              
          to Gilligan, identification is further complicated by the fact              
          that detection of the presence of amidated peptides is not a                
          reliable indicator of the presence of the enzyme being sought.              
          It is not seen how the development of a particular                          
          purification technique by Gilligan reduces the uncertainties                
          involved in identifying a suitable source for purification.                 






















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