THE CONSTRUCTION OF AN EBV-xy1E SHUTTLE VECTOR SYSTEM FOR THE STUDY OF MUTATI0N IN MAMMALIAN CELLS

摘要

The Pseudomonas putida TOL plasmid gene xy1E,whichproduces catechol 2,3-dioxygenase （CatO2ase;catechol:oxygen 2,3-oxidoreductase （decyclizing）,EC 1.13.11.2 ）was used as a target gene to study the mechanisms ofmutation and induced mutation frequency in