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. 2011 Jul 27;6(7):e22811. doi: 10.1371/journal.pone.0022811

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Osuala et al.

This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.

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Pnmt immunofluorescent staining in the adult mouse heart identifies small triangular-shaped cells (green) (a, b arrows) within the interstitial spaces. Cardiomyocyte-specific staining for sarcomeric α-actinin (red) shows identifiable striations in branching cells. Immunofluorescent co-staining with Pmnt and sarcomeric α-actinin shows apparent Pmnt expression within some cardiomyocytes (c, arrowheads).