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Relative expression of integrin beta 1 in hADSCs after adhesion on each gradient surface (L-0.5, L-2.5, and L-4.5) on days 1 and 5. Levels of messenger RNA (mRNA) were measured with reverse transcription-polymerase chain reaction (RT-PCR) and normalized with β-actin mRNA (*** p < 0.05).
