Eisenstein B I, Sox T, Biswas G, Blackman E, Sparling P F
Science. 1977 Mar 11;195(4282):998-1000. doi: 10.1126/science.402693.
Certain gonococci, which heretofore have lacked a conjugal mating system, can sexually transfer a small plasmid (4.5 x 10)6) daltons) which carries the gene for beta-lactamase production. Frequencies of conjugal transfer were similar into diverse recipients (other gonococci, Neisseria flava, and Escherichia coli), which suggests that gonococci may transfer the plasmid promiscuously in nature.
某些迄今缺乏接合交配系统的淋球菌能够通过性方式转移一个携带β-内酰胺酶产生基因的小质粒（4.5×10⁶道尔顿）。向不同受体（其他淋球菌、微黄奈瑟菌和大肠杆菌）的接合转移频率相似，这表明淋球菌在自然环境中可能会随意转移该质粒。
