Expression of a dominant-negative mutant TGF-beta type II receptor in transgenic mice reveals essential roles for TGF-beta in regulation of growth and differentiation in the exocrine pancreas - Bottinger, E P; Jakubczak, J L; Roberts, IS D; Mumy, M; Hemmati, P; Bagnali, K; Merlino, G; Wakefield, L M (EMBO J, 1997)