cervical cancer cell line (HeLa), human
hepatoma cell line (RG), mouse breast cancer cell line (4T1), human
proximal tubular epithelial cell line (HK-2), human non-small cell
lung adenocarcinoma cell line (H1975), human oral epidermoid carcinoma
cell line (KB), and human breast cancer cell line (MCF-7) were obtained
from the Laboratory Center for Medical Science of Lanzhou University.
Dulbecco’s modified Eagle’s medium (DMEM), RPMI-1640,
and fetal bovine serum (FBS) were purchased from Gibco. Neonatal bovine
serum (NBS) was obtained from Sijiqing Biotech (Hangzhou, China).
All Fmoc-protected amino acids, 1-hydroxybenzotriazole (HOBT), O-benzotriazole-N,N,N′, and N′-tetramethyl-uronium-hexafluoro-phosphate (HBTU),
were purchased from GL Biochem (Shanghai, China). Rink amide MBHA
resin was obtained from Hecheng (China). Triisopropylsilane (TIS), N,N-diisopropylethylamine (DIEA), and trifluoroacetic
acid (TFA) were supplied by J&K (China). 1,2-Ethanedithiol and
2,2′-dithiodipyridine were purchased from Energy Chemical.
Propidium iodide (PI) and 3-(4,5-dimethylthiazol-2-yl)-2,5-diphenyltetrazolium
bromide (MTT) were ordered from Sigma-Aldrich. Triton X-100 was obtained
from Solarbio (China).