Figure 1.Characterization of early-passage and senescent WI-38 cells.(A)
Micrographs illustrating β-galactosidase activity in young (Y)
early-passage (pdl 22) and senescent (S), late-passage (pdl 52) WI-38
cells. (B) Western blot analysis of the proteins indicated in
whole-cell lysates prepared from Y and S WI-38 populations; β-actin
served as a loading control.
