Structural analysis and detection of cTGFBR2 protein isoforms. (A) The domains of cTGFBR2 isoforms were predicted using SMART (http://smart.embl-heidelberg.de/). SP, signal peptide; ecTbetaR2, Transforming growth factor beta receptor 2 ectodomain; TR, Transmembrane region; S_TKc, Serine/threonine-protein kinases. (B) Western blotting analysis of cTGFBR2 protein isoform expression in the pooled tissue protein lysate (abdominal fat, heart, liver, kidney, gizzard, and muscle). The pooled tissue protein lysate was generated from the 4-wk-old AA broilers and immunoblotted with the indicated antibodies.