Research Paper Volume 2, Issue 6 pp 333—343
MicroRNA profiling in human diploid fibroblasts uncovers miR-519 role in replicative senescence
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.