Rough Endoplasmic Reticulum
This transmission electron micrograph shows the rough endoplasmic reticulum and other organelles in a pancreatic cell.
Source
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"OpenStax College, The Endomembrane System and Proteins. October 16, 2013."
http://cnx.org/content/m44435/latest/Figure_04_04_02_new.jpg
OpenStax CNX
CC BY 3.0.
