(d,e) ULK1 and AMBRA1 constructs are illustrated. Asterisks mark nonspecific bands corresponding to immunoglobulins. (d) HEK293 cells were co-transfected with vectors encoding AMBRA1 together with ULK1-Myc FL (full length) or its deletion mutants encoding the kinase and the proline-rich domains (Δ829-1,051), and the ULK1 carboxy-terminal domain (Δ1-828). Protein extracts were immunoprecipitated using anti-Myc antibody. 