1. Key Laboratory of Molecular Epigenetics of MOE and Institute of Genetics & Cytology, Northeast Normal University, Changchun, China
2. Department of Biological and Physical Sciences, Karatina University, P.O. Box 1957, 10101 Karatina, Kenya
3. School of Life Sciences, Linyi University, Linyi, China
4. National Demonstration Center for Experimental Biology Education, Northeast Normal University, Changchun, China