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Cell viability of the WJ-MSCs evaluated at the m-GO film before and after conjugate with peptide sequences (PepS1, PepS2, PepS3, and PepS4) was quantified by MTT assay. WJ-MSCs were seeded in a 48-well plate at a density of 1 × 104 cells/well for 6 days. The error bars represent the SD about the mean. Asterisk (*) indicates statistical significance (p < 0.05) compared with the m-GO film on the same day.
