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. 2011 Oct 24;15(11):2539–2551. doi: 10.1111/j.1582-4934.2011.01417.x

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© 2011 The Authors Journal of Cellular and Molecular Medicine © 2011 Foundation for Cellular and Molecular Medicine/Blackwell Publishing Ltd

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Fig 11 — Electron micrographs (A–C) show peripheral couplings or ‘Ca²⁺ release units’ in HFK-iPSC-CM visible as small dense structures (white arrows) between peripheral sarcoplasmic reticulum (SR) and plasmalemma. Longitudinally (A) and transversally (B) sectioned myofilaments. Thin (small black arrow) and thick (thick black arrow) myofilaments are visible in the transverse section (B). Z: Z bands; gly: glycogen; mf: myofilaments; m: mitochondria; CM1 and CM2: indicates that these are different adjacent cardiomyocytes.