|
|
|
|
|
|
|
||||
| Home Help Feedback Subscriptions Archive Search Table of Contents | ||||
|
Fig. 4. Orthologs of ANR-marking genes are expressed anterior to the CNS. All
panels are left lateral views, all insets are frontal. (A) In
incipient-tailbud stage, the stomodeal primordium expresses six3/6a.
(B) The anterior pharynx primordium and the tail muscle precursors express
pitx at incipient-tailbud stage. (C) Schematic overlay of
pitx and six3/6a in which the anterior pitx domain
lies just interior to the ectodermal six3/6a expression. (D) In
mid-tailbud stage the six3/6a ectodermal expression (blue arrowhead)
changes shape (see inset). (E) Ectodermal cells begin to express pitx
by mid-tailbud stage in weak (purple arrowhead) and strong (purple double
arrowheads) domains. (F) Double in situ reveals that only the ventral rank of
ectodermal cells weakly expressing pitx overlaps six3/6a
expression, while the dorsal pitx-expressing cells do not. (G)
Schematic summarizing overlapping (checkered) and non-overlapping
pitx and six3/6a domains. (H) A horizontal row of ectodermal
cells expresses eya in mid-tailbud embryos. (I) Schematic shows
inferred overlapping (checkered) and non-overlapping eya and
pitx domains. ec, ectoderm; en, endoderm; gi, endodermal gill pouch
primordium; ph, pharynx primordium. Black arrowhead indicates separation
between trunk and tail. Scale bars: 20 µm.
|
