It is a commonly used eukaryotic receptor cell in gene cloning experiments, and it is as convenient to cultivate yeast as culturing E. coli. There are also many types of yeast cloning vectors. Yeast also has plasmids. This 2μm long plasmid is called 2μm plasmid, about 6 300bp. This plasmid exists outside the chromosomes in the nucleus for at least a period of time. The 2μm plasmid and E. coli plasmid can be used to construct a shuttle plasmid that can shuttle between bacteria and yeast cells. Yeast cloning vectors are all constructed on this basis.
Yeast is a single-celled fungus, not a unit of phylogenetic classification. A tiny single-celled microorganism that is invisible to the naked eye. It can ferment sugar into alcohol and carbon dioxide. It is distributed throughout nature. It is a typical heterotrophic facultative anaerobic microorganism that can survive both aerobic and anaerobic conditions. It is a natural leavening agent.