domain organization (A1-A2-B-A3-C1-C2) and are both extensively glycosylated within their
B-domains. In mammalian cell expression systems, compared with FV, the FVIII primary
translation product is inefficiently transported out of the endoplasmic reticulum. Here we
show that FVIII is degraded within the cell by a lactacystin-inhibitable pathway, implicating
the cytosolic 20 S proteasome machinery. Protein chaperones calnexin (CNX) and …