Fig 2B Lomaga MA; Henderson JT; Elia AJ; Robertson J; Noyce RS; Yeh WC; Mak TW "Tumor necrosis factor receptor-associated factor 6 (TRAF6) deficiency results in exencephaly and is required for apoptosis within the developing CNS" 2000 J Neurosci 20(19):7384-93. [PMID:11007897]