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Representative immunohistochemistry showing expression of the H2S producing enzyme cystathionine γ-lyase (CSE) CSE in liver (A) and cardiac (C) tissue samples. Positive staining for the H2S producing enzyme cystathionine β-synthase (CBS) in liver (B) and heart (D). Insets: Magnification of microvessels show modest staining for both CSE and CBS in liver and cardiac tissue samples.
