Paraffin-embedded tissue sections (2–4 µm) were deparaffinized in xylene, rehydrated through graded ethanol, and blocked for endogenous peroxidase before being subjected to heat-induced epitope retrieval (Armstrong et al., 2016). IHC staining was performed using DECR1 (HPA023238, Sigma Aldrich, diluted 1:500) antibody and the 3,3′-Diaminobenzidine (DAB) Enhanced Liquid Substrate System tetrahydrochloride (Sigma Aldrich) as described previously (Armstrong et al., 2016). Intensity of DECR1 immunostaining was measured by video image analysis (Armstrong et al., 2016).
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