TGF-BETA RECEPTOR TYPE I PRECURSOR (EC 2.7.1.37) (TGFR-1) (TGF-BETA TYPE I RECEPTOR) (SERINE/THREONINE-PROTEIN KINASE RECEPTOR R4) (SKR4) (ACTIVIN RECEPTOR-LIKE KINASE 5) (ALK-5). [Source:SWISSPROT;Acc:P36897]