About the Authors

Tingting Guo
Jian Kong

kongjian@sdu.edu.cn

Affiliation State Key Laboratory of Microbial Technology, Shandong University, Jinan, People's Republic of China

Li Zhang
Chenchen Zhang
Shumin Hu

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: TG JK SH. Performed the experiments: TG LZ CZ. Analyzed the data: TG JK SH. Contributed reagents/materials/analysis tools: TG JK LZ CZ. Wrote the paper: TG JK.