Fig2Ba.Copyright: Reprinted with permission from Elsevier from [doi:10.1016/S0925-4773(02)00394-5] Mech Dev 119: 251-6, Watabe-Rudolph M; Schlautmann N; Papaioannou VE; Gossler A, The mouse rib-vertebrae mutation is a hypomorphic Tbx6 allele. Copyright 2002