Method Bifidobacterium plasmid was extracted by mutanolysin from Streptomyces globisporus which could lyse the wall of bifidobacterium.The result was compared with that by lysozyme.
More specialized vectors have been engineered to use aspects of plasmids and bacteriophages, such as the plasmid-bacteriophage h hybrids known as cosmids
The cytoplasm contains ribosomes which are the site of protein synthesis, the nucleoid which contains the genetic material, and plasmids which contain genes that confer a selective advantage to the bacterium.
But also, a much more terrifying explanation has to do with plasmids, which are parts of the bacterial DNA. The plasmid enters and multiplies itself within a cell and can then be transferred to others.
而且,一个更可怕的解释与质粒有关,质粒是细菌 DNA 的一部分。 质粒进入细胞并在细胞内自我繁殖, 然后可以转到其他细胞中。
And the thing that makes this mutation especially troubling is that it was found on a plasmid -- a little piece of DNA that can be easily shared between neighboring bacteria, meaning it can spread more easily.
让这种突变特别麻烦的是它是在质粒上发现的——一小段 DNA 可以很容易地在相邻细菌之间共享,这意味着它可以更容易地传播。