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. 2021 May 6;2:670267. doi: 10.3389/fragi.2021.670267

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Copyright © 2021 Collins, Kane, Litovsky, Darley-Usmar, Young, Chatham and Zhang.

This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms.

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Example images of cardiac cellular structures examined using TEM studies from wild-type mouse hearts. (A) TEM image showing mitochondria surrounding a lipid droplet; (B) Magnification of Lipid droplet in (A); (C) TEM image of cardiac sarcomeric structure; (D) TEM image of SR-mitochondria connections. Red arrows depict mitochondria and white arrow depicts SR; (E) TEM image showing glycogen deposits (highlighted in red box); (F) TEM image of a nucleus; (G) TEM image of gap junctions (gap junctions depicted by red arrows); and (H) TEM image showing a mitochondrial derived vesicle budding from larger mitochondria (highlighted by red box). Images are unpublished images from Zhang lab studies. Scale bar depicts 500 nm.