About the Authors

Chao Ran

Contributed equally to this work with: Chao Ran, Suxu He

Affiliation Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, P. R. China

Suxu He

Contributed equally to this work with: Chao Ran, Suxu He

Affiliation Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, P. R. China

Yalin Yang

Affiliation Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, P. R. China

Lu Huang

Affiliation Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, P. R. China

Zhigang Zhou

zhou_zg@msn.com

Affiliation Key Laboratory for Feed Biotechnology of the Ministry of Agriculture, Feed Research Institute, Chinese Academy of Agricultural Sciences, Beijing, P. R. China

Competing Interests

The authors have declared that no competing interests exist.

Author Contributions

Conceived and designed the experiments: ZZ SH. Performed the experiments: SH YY LH. Analyzed the data: CR. Wrote the paper: CR SH ZZ.