Abstract: Disclosed in the present application is a self-heating structure and a battery pack including the same. The self-heating structure includes a heating member, including a heating body and a connection lead molded on the heating body, the connection lead being used for electrically connecting a positive electrode tab of a core pack or a negative electrode tab of the core pack, so that a self-heating circuit is formed by the heating member and the core pack; and a control unit, controlling an on/off switching of the self-heating circuit according to temperature of the core pack, the control unit being provided on the connection lead to integrate the control unit and the connection lead.

Abstract: This disclosure relates to an efficient protein expression system that utilizes piggyBac transposons and/or regulatory elements.

Abstract: Provided is a polynucleotide the polynucleotide can be used as a WXRE transcriptional regulatory element used to increase the protein expression level of a protein expression system. A protein expression vector or a protein expression systems comprising the above-mentioned WXRE transcriptional regulatory element as well as the use thereof are also provided. The use of the WXRE transcriptional regulatory element can increase the expression level of a heterologous protein greatly with its biological activity unchanged.

Abstract: Provided is a polynucleotide, the polynucleotide can be used as a WXRE transcriptional regulatory element used to increase the protein expression level of a protein expression system. A protein expression vector or a protein expression system comprising the above-mentioned WXRE transcriptional regulatory element as well as the use thereof are also provided. The use of the WXRE transcriptional regulatory element can increase the expression level of a heterologous protein greatly with its biological activity unchanged.

Abstract: Provided is a polynucleotide, the polynucleotide can be used as a WXRE transcriptional regulatory element used to increase the protein expression level of a protein expression system. A protein expression vector or a protein expression system comprising the above-mentioned WXRE transcriptional regulatory element as well as the use thereof are also provided. The use of the WXRE transcriptional regulatory element can increase the expression level of a heterologous protein greatly with its biological activity unchanged.