Materials
Sesame seeds (Yuzhi No. 4; Zhumadian, Henan, China) were purchased and stored at 4 °C until use. 4-(2-Aminoethyl)benzenesulfonyl fluoride hydrochloride (AEBSF), pepstatin A, and TCA were purchased from Sigma-Aldrich Trading Co., Ltd. (Shanghai, China). β-mercaptoethanol and SDS were purchased from Sinopharm Chemical Reagent Co., Ltd. (Shanghai, China). All other reagents were of analytical grade.