Shenyang Pharmaceutical University No.103 Wenhua Road Shenyang 110016 China;
Liaoning Satellite Biotechnology Products Research Institute No.51-3 Dongzhan Street Shenyang 110044 China;
Shenyang Pharmaceutical University No.103 Wenhua Road Shenyang 110016 China;
Protein; Spherical crystal; Characterization; Sustained release;