Model organism for genetics, physiology, biochemistry. Escherichia coli str. K-12 substr. MG1655

Escherichia coli str. K-12 substr. MG1655. Non-pathogenic strain MG1655 approximates wild-type E. coli as it has been maintained with very little genetic manipulation except for the curing (removal) of bacteriophage lambda and the F plasmid. MG1655 was derived from strain W1485, which was derived by Joshua Lederberg from the original K-12 isolate obtained from a patient in 1922.

大肠埃希氏菌（Escherichia coli）K-12亚种MG1655菌株。该无毒株高度近似野生型大肠埃希氏菌，因其仅进行了λ噬菌体与F质粒的清除（移除）操作，几乎未开展其他遗传修饰。MG1655源自W1485菌株，而W1485菌株由约书亚·莱德伯格（Joshua Lederberg）从1922年从一名患者体内分离得到的原始K-12分离株衍生而来。