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. 2016 Jun 27;5(6):e003699. doi: 10.1161/JAHA.116.003699

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© 2016 The Authors. Published on behalf of the American Heart Association, Inc., by Wiley Blackwell.

This is an open access article under the terms of the Creative Commons Attribution‐NonCommercial‐NoDerivs License, which permits use and distribution in any medium, provided the original work is properly cited, the use is non‐commercial and no modifications or adaptations are made.

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Development of titin, myosin heavy chain (MyHC) and troponin T (TnT) isoform expression. A, Representative Coomassie‐stained 1% SDS‐agarose gel of titin isoforms in RV samples obtained at the indicated ages; rabbit soleus and rat left ventricle (LV) were used as markers. B, Western blot probing for TnT, guinea pig myocardium expressing 4 isoforms, and human recombinant (hcTnT) are shown for comparison; in all human samples the predominant isoform is TnT3. C, Representative SDS‐PAGE of separation of MyHC isoforms, markers for α‐ and β‐MyHC isoforms: atrium (A), nonfailing adult heart (NF), and comigration (NF:A). Pediatric patients express only the β‐MyHC.