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Figure 2 Representative inducible nitric oxide synthase (iNOS) immunohistochemical stains. (Left) Negative control (non-immune, rabbit immunoglobulin G in place of primary antibody). (Middle) Pre-VAD sample demonstrating positively stained cardiomyocytes with iNOS localized within the cytoplasm. (Right) Post-VAD myocardial sample obtained from the same patient shown in Figure 1B. Inducible NOS immunostaining is barely detectable in this sample. VAD = ventricular assist device.
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