Cell adhesion versus time on three different substrates. Cell adhesion versus time on three different substrates: ISA23-75, AGMA1-75 and TCPS. The graph shows the percentage of cells with polygonal-like shape on ISA23-75, AGMA1-75 and TCPS. In the first hour after seeding, MDCK cells have a similar behaviour on ISA23-75 and on AGMA1-75. After a few hours the modified cells are significantly higher on AGMA1-75 than ISA23-75 and approach the percentage on TCPS. Data represent mean ± σ. From ANOVA test ** indicates significant at 1% level vs TCPS at the same time.