Burck C, Shapiro J A, Hauer B
Mol Gen Genet. 1984;194(1-2):340-2. doi: 10.1007/BF00383538.
A p lambda CM2 replicon derived by an N- deletion from lambda::Tn9 which carries the imm434 immunity region is incompatible with some (but not all) IncP-1 plasmids. The imm lambda p lambda CM1 replicon does not show the same incompatibility behavior.