Chromatin immunoprecipitation (ChIP), immunoblotting, immunofluorescence, or immunohistochemistry were performed using the following antibodies: anti-α-SMA (#19245T; Cell Signaling); anti-β-Actin (#64225332; Bio-Rad), anti-amylase (#ab21156; Abcam), anti-chromogranin-A (#ab45179; Abcam), anti-cytokeratin 19 (#ab52625; Abcam), anti-E-cadherin (#3195S; Cell Signaling), anti-glucagon (#2760; Cell Signaling), anti-insulin (#4590; Cell Signaling), anti-JunB (#3753; Cell Signaling), anti-Muc5AC (#ab3649; Abcam), anti-Prdm16 (#ab202344 and #ab106410; Abcam), anti-Smad2 (#5339; Cell Signaling), anti-Smad3, (#9523; Cell Signaling), anti-Smad4, (#46535; Cell Signaling), anti-Smad4 (#sc-7966; Santa Cruz), anti-Smad2/3 (#8685; Cell Signaling), and anti-vimentin (#5741S; Cell Signaling).
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