the assymmetric 18s and 14s forms of acetylcholinesterase ( ec 3.1.1.7 ) from electrophorus electricus purified by affinity chromatography on n-methylacridinium sepharose 2b were subjected to trypsin or collagenase proteolysis and changes in the enzyme composition and structure were monitored by sucrose gradient sedimentation , gel chromatography , and sodium dodecyl sulphate - polyacrylamide gel electrophoresis .
C0162745
collagenase
C0597304
proteolysis