Vitamin K-dependent carboxylase: Affinity purification from bovine liver by using a synthetic propeptide containing the ³-carboxylation recognition site - Hubbard, B R; Ulrich, M M W; Jacobs, M; Vermeer, C; Walsh, C; Furie, B; Furie, B C (Proc Natl Acad Sci USA, 1989)