Analysis of autophagosome formation using CLEM tomography

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One of the cell survival mechanism called autophagy gets activated when cells face starved condition, accumulates abnormal proteins, bacterial invasion and so on. Autophagosome (AP) is formed newly within cytosol that gets fused with lysosomes for degradation. Where AP is formed within cells have been a long-standing question since that will leads to its membrane source. We identified such site to be ER-mitochondria contact site (Nature, 2013). AP formation is dynamic and this finding will help characterizing the most interesting part of formation.