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Figure 2


Fig. 2. The CNH region of the tail bud. (A) Caudal region of a stage 15 HH (26 somite) chicken embryo with the paraxial mesoderm removed and grafted regions indicated: Nc, notochord; CNH, chordoneural hinge; TBM, tail bud mesoderm. (B,B') Mid-sagittal section of a same stage chicken embryo (B) immunostained for laminin (red in B'). Arrow, cloacal membrane; arrowhead, posterior surface ectoderm. The three grafted regions are indicated: 1, CNH; 2, dpTB; 3, ventral TB. (C,C') Mid-sagittal section of a corresponding stage mouse embryo (10.5 dpc, C) immunostained for laminin (red in C'). Arrowhead, posterior surface ectoderm. Regions equivalent to those in B' are indicated. Blue, nuclear stain. Scale bars: 0.1 mm.