|
Figure 4. ALK4 distribution in neurula stage embryos. A,C,E,G,J: Embryos were collected at stages 15 (A), 18 (C), 20 (E,G), 22 (I), and 24 (J) and whole-mount hybridized with either an ALK4 antisense probe (A,C,E,J) or ALK4 sense probe (G). B,D,F,H,I,K,L: Hybridized embryos were sectioned transversely (B,D,F,H,I) or sagittally (K,L). BA, branchial arches; CG, cement gland; ECT, ectoderm; EV, eye vesicle; HF, heart field; LPM, lateral plate mesoderm; NF, neural fold; NT, neural tube; NTC, notochord; OP, otic placode; SM, somitic mesoderm; SC, spinal cord. |