Author,Title,Journal,ISSN,Publisher,Date,Volume,Number,Page,URL,URL(DOI) Masahiro Kawabata and Hirofumi Inoue and Aki Hanyu and Takeshi Imamura and Kohei Miyazono,Smad proteins exist as monomers in vivo and undergo homo- and hetero-oligomerization upon activation by serine/threonine kinase receptors,The EMBO Journal,0261-4189,Springer Science and Business Media LLC,1998-07-15,17,14,4056-4065,https://cir.nii.ac.jp/crid/1364233269603842816,https://doi.org/10.1093/emboj/17.14.4056