Fig. 4. CNIH interacts with proteins of the secretory pathway. (A) CNIH interacts with GM130. HeLa cells, transfected to express Myc-tagged GM130 with or without Flag-CNIH, were subjected to anti-Flag immunoprecipitation and immunoblotting with anti-Myc, or conversely with anti-Myc followed by anti-Flag immunoblotting. (B) HeLa cells, transfected to express Flag-tagged GRASP55, with or without TGF
or Myc-tagged CNIH, were subjected to anti-Flag immunoprecipitation, followed by immunoblotting for TGF
or Myc-CNIH. GRASP55 immunoprecipitated with CNIH in the presence of TGF
, but not in its absence. *Bands corresponding to a remaining GRASP55 immunoblot signal prior to tubulin immunoblotting. All samples were prepared and loaded in duplicate.