Gibson E M, Chace N M, London S B, London J
J Bacteriol. 1979 Jan;137(1):614-9. doi: 10.1128/jb.137.1.614-619.1979.
The transmissible plasmid pAMbeta1, which codes for erythromycin and lincomycin resistance, was conjugally transferred from a Lancefield group F Streptococcus to a strain of Streptococcus avium. Both organisms served as pAMbeta1 donors for three strains of Lactobacillus casei. Introduction of pAMbeta1 into one of the L. casei strains caused the organism to lose its native 6.7 X 10(6)-dalton plasmid. Loss of the native plasmid produced no alterations in the organism's growth characteristics or fermentation pattern.
编码红霉素和林可霉素抗性的可转移质粒pAMbeta1通过接合作用从兰斯菲尔德F群链球菌转移至鸟链球菌菌株。这两种细菌都作为pAMbeta1供体，将其转移至三株干酪乳杆菌。将pAMbeta1导入其中一株干酪乳杆菌菌株后，该菌株失去了其原有的6.7×10⁶道尔顿质粒。原生质粒的丢失并未改变该菌株的生长特性或发酵模式。
