Fig. 28. Very high power TEM of a portion of the nucleus (N) of an epiblast cell of a stage 3 embryo in vitro, 145-170 hours post-insemination (original magnification x27,200). The rough endoplasmic reticulum (RER) is continuous with the outer nuclear membrane.
(From: Lopata, Kohlman, and Kellow, 1982. Reproduced with permission of the publisher, John Wiley & Sons.)
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