(e) The deficiency of Atg14L impairs the protein interaction between Beclin 1 and NRBF2. NIH3T3 cells were transfected with Atg14L or NRBF2 RNAi for 72 h, respectively, and then were lysed and subjected to IP using Beclin 1 antibody. The immunoprecipitants were immunoblotted using the indicated antibodies. 