Fig. 5.
Effect of lactacystin on the synthesis of normal VWF and Cys1149Arg.
BHK cells expressing normal VWF (A) or Cys1149Arg (B) treated without (control) or with lactacystin were pulse-labeled with [35S]cysteine and [35S]methionine for 30 minutes and chased in unlabeled complete medium for the times indicated. VWF was immunoprecipitated from cell lysates and conditioned medium for analysis by SDS-PAGE on 5% polyacrylamide gels and autoradiography as described under “Materials and methods.” The positions of pro-VWF (about 350 kd) and mature VWF subunits (about 250 kd) are indicated at the right.