IUBMB Enzyme Nomenclature
/ EC 3.4.21.89
... 1. Black, M.T. Evidence that the catalytic activity of prokaryote leader
peptidase depends upon the operation of a serine-lysine catalytic dyad. ... 5. Tschantz, W.R. and Dalbey,...
http://www.chem.qmul.ac.uk/iubmb/enzyme/EC3/4/21/89.html