Sanford Palay, Eichi Yamada (2011) CIL:10772, Homo sapiens, motor neuron, adrenocorticotropic hormone secreting cell. CIL. Dataset

Figures 173 (upper panel) and 174 (lower panel) from Chapter 5 (Endoplasmic Reticulum) of 'The Cell, 2nd Ed.' by Don W. Fawcett M.D. Electron micrographs of endoplasmic reticulum with the section plane parallel to the cisternae, revealing the arrangement of ribsomes along them. The upper panel is from a large neuron and shows numerous free polysomes associated with a Nissl body; arrows capture two regions where the plane is tangential to the cisternae, and shows ribosomes arranged in loops, spirals and rosettes. The lower panel, from a glandular, adrenocortical cell of a human fetus at 27 weeks, the section plan is tangential to three cisternae. This view reveals long loops and spirals of multiple ribosomes aligned along a single molecule of messenger RNA. Upper image by Sanford Palay; lower image by Eichi Yamada. A PDF copy of the accompanying chapter is available on the ASCB’s BioEDUCATE website.

图173（上面板）和174（下面板）摘自《细胞》第2版第5章（内质网）中，由Don W. Fawcett M.D.所著。该数据集展示了内质网的电子显微镜图像，切片平面与囊膜平行，揭示了核糖体沿其排列的形态。上面板来源于一个大神经元，显示了与尼氏体相关的多个游离的多聚核糖体；箭头所指区域显示切片平面与囊膜相切，其中核糖体呈环状、螺旋状和蔷薇状排列。下面板来源于一个27周人胎儿肾上腺皮质细胞，切片平面与三个囊膜相切。这一视角揭示了多个核糖体沿单分子信使RNA排列的长环和螺旋。上图像由Sanford Palay提供；下图像由Eichi Yamada提供。可在ASCB的BioEDUCATE网站上获取相关章节的PDF副本。