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1 pole of endomesodermal precursors (2M and 3E macromeres).
2 st quartet micromeres specify the D quadrant macromere.
3 interaction between the micromeres and the D macromere.
4 development because it is too far from the D macromere.
5 MAPK and biasing the specification of the 3D macromere.
6 ve glands, which arise from the fourth order macromeres.
7 parenchyma, is generated by both third duet macromeres.
8 derived from the two diagonally opposed 2M/ macromeres.
9 4d) and some of its derivatives and selected macromeres.
10 cation of 3D among four initially equivalent macromeres.
11 der cell, empowering its great-granddaughter macromere 3D to act as a single-celled organizer that in
13 c Ilyanassa obsoleta demonstrate that the 3D macromere acts as an embryonic organizer, by signaling t
15 ends on autonomous beta-catenin signaling in macromeres and does not require micromere or veg2-induct
16 ular, at the eight-cell stage there are four macromeres and four micromeres, and each of these cells
19 ge, which results in two large vegetal pole 'macromeres' and numerous small animal pole 'micromeres'.
20 yo are larger than the corresponding vegetal macromeres, and generate most of the larval ectoderm.
21 the progeny of animal micromeres and vegetal macromeres are established during the interval between t
23 shape changes involving protrusion of the 3D macromere at the 24-cell suggest that the D quadrant is
26 res and the vegetal macromeres specify which macromere becomes the 3D cell during the interval betwee
27 , MAPK activation was not detected in the 3D macromere but was observed in one of its daughter cells,
28 ot influenced by its close position to the D macromere, but is restricted by its polar lobe lineage.
30 cell quadrant on the opposite side, with its macromere centered under the greatest number of the rema
31 en the sister cells DNOPQ and DM, progeny of macromere D' at fourth cleavage: DNOPQ is the segmental
32 cific mechanisms operate, as turnover in the macromeres depends on entry of SoxB1 into nuclei, and on
35 which initiates expression in micromere and macromere descendant cells early in cleavage, Tcf1 sites
36 lso demonstrate that LvDelta is expressed by macromere descendants during mesenchyme blastula and ear
37 is required for the specification of the 3D macromere, during the late 16-cell through early 24-cell
39 eptive to the micromere inductive signal the macromeres first must transport beta-catenin to their nu
40 ust be downstream of nuclear beta-catenin in macromeres for these cells to receive and transduce the
44 quartet micromere relative to the inducing D macromere is important for determining whether or not it
48 specify 3D potential, but rather makes the D macromere lineage responsive to some intercellular signa
49 beled micromere is placed ectopically at the macromere/mesomere boundary, the PMC progeny ingress ect
53 tion signal is passed from the micromeres to macromere progeny between the eighth and tenth cleavage.
56 t the vegetal pole results in the failure of macromere progeny to specify secondary mesenchyme cells
58 condary mesoderm cell (SMC) specification in macromere progeny, and expression of the early endomesod
61 xpression of an activated Notch construct in macromeres rescues SMC specification in the absence of i
63 the first quartet micromeres and the vegetal macromeres specify which macromere becomes the 3D cell d
64 Significantly, misexpression of Lvalx1 in macromeres (the progenitors of NSM cells) is sufficient
65 ctivities and their region of overlap in the macromeres, which specifies these cells as early mesendo
66 The ectoderm originates from three of the macromeres, while the remaining macromere generates the