Fig. 4. Histological analysis of mutant OE. (A) Schematic model of mouse OE
development. OP, olfactory placode; NP, nasal pit; FB, forebrain; MNP, medial
nasal process; LNP, lateral nasal process; S, nasal septum; NC, nasal cavity.
(B) Hematoxylin-eosin staining was performed on 20 µm cryosections through
the entire frontonasal region of control and mutant embryos from E10.5-E17.5.
Scale bar: 200 µm. CP, cartilage primordium of nasal capsule; H, heart; L,
lens; MB, midbrain; NR, neural retina; Tel, telencephalon.