cellular digestion
How Autophagy Works
Muriel Mari, Sharon A. Tooze, and Fulvio Reggiori | Feb 1, 2012
There are five steps of autophagosome biogenesis: induction, expansion, vesicle completion, fusion, and cargo degradation. 
The Enigmatic Membrane
Muriel Mari, Sharon A. Tooze, and Fulvio Reggiori | Feb 1, 2012
Despite years of research, the longstanding mystery of where the autophagosome gets its double lipid bilayers is not much clearer.