(b) HEK293 cells were transfected with TRAF6 RNAi oligonucleotide (TRAF6 siRNA) or unrelated oligonucleotides as a control (Ctrl siRNA). Then, cells were co-transfected with vectors encoding ULK1-HA and ULK1-Myc and protein complexes were immunoprecipitated using anti-Myc antibody. Protein extracts were analysed by western blotting using anti-HA, anti-Myc and anti-TRAF6 antibodies. Quantification of ULK1-HA relative to ULK1-Myc is reported on the right. n = 3 extracts prepared from independent experiments. Data are presented as means±s.d. and significance is P = 0.037. 