丝状蓝藻Ｐｌｅｃｔｏｎｅｍａ ｂｏｒｙａｎｕｍ的ｐＰｂ１经ＨｐａⅡ酶酶切与ＡｃｃＩ酶酶切的ｐＵＣ１３构成杂合质粒，杂合质粒克隆到Ｅ．ｃｏｌｉＪＭ１０９，频率为３．４％．转化进Ｅ．ＣｏｌｉＪＭ１０９的杂合粒，用ＥｃｏＲＩ和ＨｐａＩ酶切后得到证实。杂合质粒转化到新制备的......