2.1. Reagents
Herbal products with potential antivirus activity were obtained from
Tianjiang Pharmaceutical Co., Ltd. (Jiangsu, China). Ammonium
bicarbonate (NH4HCO3), dithiothreitol,
and hydrochloric acid (HCl) were provided from Sinopharm Chemical
Reagent Co., Ltd. (Shanghai, China). Urea was purchased from Dalian
Meilun Biotechnology Co. Ltd. (Dalian, China). Iodoacetamide,
chymotrypsin and trypsin were provided by Sigma-Aldrich (St. Louis, MO,
USA). The peptide Dabcyl-KNSTLQSGLRK-Edans was synthesized from
GenScript biology science and technology Co. Ltd. (Nanjing, China).