Olsen W L, Schoenhard D E
J Bacteriol. 1972 May;110(2):786-8. doi: 10.1128/jb.110.2.786-788.1972.
Two cryptic plasmids designated PO-1 and PO-2 that had molecular weights of 1.5 x 10(6) and 45 x 10(6) daltons, respectively, were isolated from Salmonella pullorum MS53. A 150 to 1 ratio of PO-1 to PO-2 plasmids was estimated to occur.
从鸡白痢沙门氏菌MS53中分离出两个隐蔽质粒，分别命名为PO - 1和PO - 2，其分子量分别为1.5×10⁶和45×10⁶道尔顿。据估计，PO - 1与PO - 2质粒的比例为150比1。
