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. 2011 May 26;21(4):575–588. doi: 10.1089/scd.2011.0023

FIG. 2.

FIG. 2.

Transmission electron micrographs indicating differences between hMSC types in abundance of rER and mitochondrial-to-cytoplasm area ratio. Representative images of UCBMSC showing abundant rER stacks and mitochondria (A and B). Representative images of BMMSC <18 showing fewer rER with more dilated structure and presence of several mitochondria. Also, clear vacuoles were seen (C and D). Ultrastructure of BMMSC >50 showing dilated rER and presence of clear vacuoles but lower abundance of mitochondria compared with UCBMSC and BMMSC <18 (E and F). White arrow indicates rER, black arrowhead indicates mitochondria, and black arrow indicates vacuoles. rER, rough endoplasmic reticulum.