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Figure 1. Contractile properties of left ventricular myocytes from young (Y) and aged (O) FVB or metallothionein (MT) mice. A) Resting cell length. B) Peak shortening (PS, normalized to cell length). C) Maximal velocity of shortening (+dL/dt). D) Maximal velocity of relengthening (dL/dt). E) Time-to-peak shortening (TPS). F) Time-to-90% relengthening (TR90). Mean ± SE; n = 140 cells/group; *P < 0.05 vs. FVB-Y group; #P < 0.05 vs. FVB-O group.
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