Vernon E G, Sweeney H M, Cohen S
J Bacteriol. 1970 Sep;103(3):826-9. doi: 10.1128/jb.103.3.826-829.1970.
Spontaneous reciprocal recombination was detected between the regulator genes of penicillinase plasmids and chromosomal penicillinase linkage groups of Staphylococcus aureus. The frequency of recombination varied with different penicillinase linkage groups.