Tat peptide

Chloroauric acid (HAuCl₄) was purchased from Civi-Chem (Suzhou, China). HS-PEG-COOH (MW = 5,000) were purchased from Pengshuo Biotech Co., Ltd. (Shanghai, China). Silver nitrate (AgNO₃) was purchased from Alfa (America). Ascorbic acid (AA) was purchased from Macklin (Shanghai, China). Hydrochloric acid (HCl) was purchased from Sinopharm Chemical Reagent Co. Ltd (Shanghai, China).1-Ethyl-3-(3-dimethylaminopropyl) carbodiimide (EDC) and N-Hydroxysuccinimide (NHS) were purchased from Aladdin (Shanghai, China). Phosphate buffer saline (PBS), high glucose Dulbecco's Modified Eagle's Medium (DMEM) were purchased from HyClone (America). Penicillin/ streptomycin and fetal bovine serum (FBS) were purchased from Gibco (America). Basic fibroblast growth factor (bFGF) was purchased from Invitrogen (America). TAT-peptide (residues 47-57 sequence YGRKKRRQRRR-NH₂) and FITC labeled TAT were purchased from GL Biochem Ltd (Shanghai, China). Cell counting kit-8 (CCK-8) was purchased from Beijing Zoman Biotechnology Co., Ltd. Propidium Iodide (PI) stain, 1,1′-dioctadecyl-3,3,3′,3′-tetramethylindocarbocyanine perchlorate (DiI), Western and IP kit was purchased from Beyotime Biotechnology (Shanghai, China). Culture-Inserts were purchased from Ibidi (Germany).