1. Institute of Applied Bioresource Research College of Animal Science Zhejiang University Hangzhou 310058 China
2. Key Laboratory of Silkworm and Bee Resource Utilization and Innovation of Zhejiang Province College of Animal Science Zhejiang University Hangzhou 310058 China
3. Department of Chemistry and Biochemistry Stephenson Life Sciences Research Center University of Oklahoma Norman OK 73019‐5300 USA