Fig 2B Copyright: Reprinted with permission from Elsevier from [doi:10.1016/S0925-4773(99)00187-2] Mech Dev 88: 183-94, Jonkers J; van Amerongen R; van der Valk M; Robanus-Maandag E; Molenaar M; Destree O; Berns A, In vivo analysis of Frat1 deficiency suggests compensatory activity of Frat3 Copyright 1999. [PMID:10534617]