**Author details**

Phan Van Chi and Nguyen Tien Dung *Department of Protein Biochemistry, Institute of Biotechnology (IBT), Vietnam Academy of Science & Technology (VAST), Hanoi, Vietnam* 

## **Acknowledgement**

The present study was carried out at the National Key Laboratory of Gene Technology (NKLGT) and was approved by the Ethics Committee of the Institute of Biotechnology (IBT), Vietnam Academy of Science and Technology (VAST)
