I still remember the day.It was 2012.I was checking the transmission electron microscopy images from the previous day.Something unusual caught my eyes.A structure closely resembling an opened pomegranate stood outside a cell.In retrospect,I realized I had seen these structure before,but that particular image was unusual because there were several of these large structures outside the cell.
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The State Key Laboratory of Membrane Biology Tsinghua University-Peking University Joint Centre for Life Sciences Beijing Frontier Research Center for Biological Structure School of life Sciences Beijing China;