Acknowledgments
The authors thank Yale Genetic Stock Center for providing JW2581E. coli cells. The authors also thank Dr. Tae Hyeon Yoo at Ajou University in South Korea for the kind gift of plasmid. The authors also acknowledge financial support from the Marine Biotechnology Program (Marine BioMaterials Research Center) funded by the Ministry of Oceans and Fisheries, Korea). We are grateful to Dr. The authors have no conflicts of interest.