(D) BimS-Beclin 1 binding is not sensitive to HBSS starvation. BimEL-EE (EL)/vector (IP negative control), BimEL-EE (EL)/Beclin 1-Flag (two replicates), BimL-EE (L)/Beclin 1-Flag (two replicates) or BimS-EE (S)/Beclin 1-Flag (two replicates) were transfected into HeLa cells. After 20 hr, one of EL-Beclin 1-Flag transfections, one of L-Beclin-Flag transfections and one of S-Beclin 1-Flag transfections were subjected to 2 hr HBSS starvation. Anti-Flag (M2) was used for immunoprecipitation. 