> It surely is not. An N-end rule has to do with ubiquitination, and it is > absent in E.coli.Not true. There is indeed and N-end rule in prokaryotes, including E. coli. Mediated by the ClpP protease-based system. See: http://www.cell.com/molecular-cell/abstract/S1097-2765%2808%2900692-8
Ooops! I dodn't know that. Live and learn. Thanks, Miguel! Dima