Fig. 5. Ngn1 negatively autoregulates and interacts with the Notch
pathway. (A-D) Ngn1-GFP BAC transgene expression in a wild-type E10
otocyst (A), wild-type E12.5 utricle (B), Math1-/- E14.5
utricle (C) and Ngn1-/- E12.5 utricle (D). Arrowheads in A
indicate delaminating cells with stronger GFP signal than their neighbors.
(E,F) Dll1 expression in wild-type and
Ngn1-/- otic epithelia at E11.5. pUt, presumptive
utricle; pSac, presumptive saccule. (G,H) Ngn1
mRNA expression in wild-type and Pofut-/- embryos at E9.
Insets show the invaginating otic epithelium. Arrowheads and arrows (insets)
indicate Ngn1 mRNA signal in the otic epithelium, outlined with
dotted white line. o, otic epithelium; mb, midbrain; t, trigeminal placode;
ep, epibranchial placode; sp, spinal cord.