Figure 3

Half-life of p89c-Mybex9b in K562 cells. Representative western blot shows levels of p75c-Myb and p89c-Mybex9b in: (a) cells treated with cycloheximide only and (c) cells pre-treated for 16 h with 2 μM IM before cycloheximide treatment. Levels of β-actin were measured as loading control. (b–d) Densitometric analysis from two combined experiments assessing the half-life of c-Myb isoforms.