. . "BF00337884" . . "Summary. The genes for restriction-modification system EcoRII have been cloned from plasmid N3 DNA using RSF2124 as a vector plasmid. The hybrid plasmids designated pFK321 and pFK322 contained a 5.8 megadaltons EcoRI \u2014 fragment derived from N3 DNA including the genes for restriction-modification system EcoRII and a gene for resistance to sulfanilamide."@en . . . . . . . "Molecular cloning of EcoRII endonuclease and methylase genes"@en . . . "1980" . . . . .