.
The double-membrane envelope is penetrated by nuclear pores and is continuous with the endoplasmic reticulum. The ribosomes that are bound to the cytosolic surface of the ER membrane and outer nuclear membrane are not shown.
Copyright © 1994 Bruce Alberts, Dennis Bray, Julian Lewis, Martin Raff, Keith Roberts, and James D. Watson. Published by Garland Publishing, a member of the Taylor & Francis Group. No part of the publication may be reproduced or used in any form or by any means known now or invented hereafter without the permission of the publisher.