| 摘要 |
An expression system for transforming E coll with a nucleic acid molecule of interest has an operator sequence of a cmt operon operatively linked to a promoter for the operator, and, a repressor sequence from a cym operon operatively linked to a promoter for the repressor. The expression system may have a nucleic acid molecule of interest, for example, a nucleic acid molecule that encodes a protein. Any type of E coll host cells may be transformed with the expression system. A method of producing a protein involves transforming an E coll host cell with the expression system having a nucleic acid molecule that codes for a protein, and, culturing the host cell in a culture medium under conditions in which the nucleic acid molecule will express the protein. |
