منابع مشابه
Vertebrate gastrulation.
Our understanding of the mechanisms that control gastrulation is still in its infancy. One problem is that gastrulation is a complex set of coordinated behaviours involving directional cell movements, several types of cell interactions, changes in cell fate and gene expression. Therefore, the successful analysis of its control mechanisms requires simultaneous analysis of more than one of these,...
متن کاملVertebrate Photoreceptors *
Twenty-five years ago I landed in New Haven with a suit-case, a few dollars, and an urgent desire to study chemistry and biology of which I had already had the hors d'oeuvre, as it were. I was properly matriculated, with advanced standing, in the Sheffield Scientific School. Although I intended to major in chemistry, my chief concern that first week was how to earn "bread and butter," not to sp...
متن کاملLocomotion , Vertebrate
Dickinson, M. H., Lehmann, F.-O., and Sane, S. P., 1999, Wing rotation and the aerodynamic basis of insect flight, Science, 284:1954–1960. Ekeberg, O., and Grillner, S. 1999, Simulations of neuromuscular control in lamprey swimming, Phil. Trans. R. Soc. Lond. B, 354:895–902. Kristan, W. B., Jr., Skalak, R., Wilson, R. J. A., Skierczynski, B. A., Murray, J. A., Eisenhart, F. J., and Cacciatore, ...
متن کاملPatterns of vertebrate neurogenesis and the paths of vertebrate evolution.
Any substantial change in brain size requires a change in the number of neurons and their supporting elements in the brain, which in turn requires an alteration in either the rate, or the duration of neurogenesis. The schedule of neurogenesis is surprisingly stable in mammalian brains, and increases in the duration of neurogenesis have predictable outcomes: late-generated structures become disp...
متن کاملLhx2, a vertebrate homologue of apterous, regulates vertebrate limb outgrowth.
apterous specifies dorsal cell fate and directs outgrowth of the wing during Drosophila wing development. Here we show that, in vertebrates, these functions appear to be performed by two separate proteins. Lmx-1 is necessary and sufficient to specify dorsal identity and Lhx2 regulates limb outgrowth. Our results suggest that Lhx2 is closer to apterous than Lmx-1, yet, in vertebrates, Lhx2 does ...
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ژورنال
عنوان ژورنال: Geological Magazine
سال: 1898
ISSN: 0016-7568,1469-5081
DOI: 10.1017/s0016756800184481