Definitions
from The American Heritage® Dictionary of the English Language, 5th Edition.
- noun One of the large blastomeres found in a developing embryo.
from The Century Dictionary.
- noun In embryology, the larger one of two unequal masses into which the vitellus of a lamellibranch, as a fresh-water mussel, divides; the so-called vegetative cell of Rabl, which subdivides into blastomeres, partly by fission, partly by gemmation. See
micromere . - noun In embryology:
- noun One of the large yolk-laden cells, found about one pole of an egg in case of unequal segmentation, such as occurs in the hagfish, Myxine: contrasted with
micromere .
from Wiktionary, Creative Commons Attribution/Share-Alike License.
- noun A large
blastomere .
Etymologies
from The American Heritage® Dictionary of the English Language, 4th Edition
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Examples
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Supporting this notion, selection of one macromere as 3D in the pulmonate
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Ilyanassa involves inherited factors and position with respect to the inducing D macromere.
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Furthermore, both the Delta-dependent secondary mesoderm-GRN and the late endoderm-GRN (17 to 30 h p.f.) that is subsequently activated in veg2 and veg1 macromere progeny are independent of ActivinB function.
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Thus, the primary cellular targets of ActivinB signaling during pregastrular endomesoderm development are the more vegetal (veg2) macromere derivatives.
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The micromere determinant Pmar1 activates the PMC-GRN and transmits endomesoderm-inducing signals to macromere descendants.
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The second quartet cells divide at the same time as their macromere sisters, in the transition from the 16-cell to the 24-cell stage.
PLoS ONE Alerts: New Articles Morgan Q. Goulding 2009
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Ilyanassa involves inherited factors and position with respect to the inducing D macromere.
PLoS ONE Alerts: New Articles Morgan Q. Goulding 2009
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The D quadrant founder cell and 1D macromere are shaded pink-gray.
PLoS ONE Alerts: New Articles Morgan Q. Goulding 2009
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Supporting this notion, selection of one macromere as 3D in the pulmonate
PLoS ONE Alerts: New Articles Morgan Q. Goulding 2009
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Second, SoxB1 clearance is not required for activation of the early EM-GRN because macromere progeny express early Pmar1-responsive core factors in this subnetwork before SoxB1 protein levels are detectably reduced in nuclei of the same cells.
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