Smad3抑制剂,SIS3(1毫克)产品是A potent and selective inhibitor of Smad3 function. SIS3 selectively inhibits TGF-β1/ALK5-induced Smad3 phosphorylation. Also inhibits the TGF-β1 effect on type I procollagen expression at the transcriptional levels via the Smad3-binding site.