The 329 bp terminal inverted repeat sequence can't form the conserved fold-back secondary structure as that of many Streptomyces linear replicons. Lacking of typical Streptomyces tap/tpg locus for te-lomere replication, pPR2.3c encodes a protein with two domains resembling the telomere associated protein of Strepto-myces and helicase of Haemophilus respectively. No typical Streptomyces iteron-rep locus for replication from the cen-trally located origin, two DNA fragments containing almost all pPR2 were cloned and introduced by transformation into S.

其端粒末端反向重復序列的長度為329 bp，不能像多數(shù)鏈霉菌的線型質粒那樣能形成保守的&折返&的二級結構。pPR2雖然沒有參與鏈霉菌端粒復制的保守的tap/tpg基因，但是pPR2.3c基因編碼了一個雙結構域蛋白，分別同鏈霉菌的端粒復制相關蛋白Tap和嗜血桿菌的解旋酶具有相似性黄色视频美女。pPR2缺少典型的鏈霉菌重復序列-復制基因區(qū)段，將幾乎覆蓋全長pPR2的兩段DNA進行克隆后jiujiure综合网，不能轉化變鉛青鏈霉菌国产黄色网站在线免费。

inverted boat-shaped stratum：覆舟層

覆舟層 inverted boat-shaped stratum | 倒扇褶皺 inverted fan fold | 倒轉褶皺 inverted fold

inverted boat-shaped stratum：覆船層

仰拱 inverted arch | 覆船層 inverted boat-shaped stratum | 倒扇狀褶曲 inverted fan fold

inverted drainage well：反滲排水井

invertebrates 無脊椎動物 | inverted drainage well 反滲排水井 | inverted fold 倒轉褶皺