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FGF-dependent midline-derived progenitor cells in hypothalamic
FGF-dependent midline-derived progenitor cells in hypothalamic

... Fig. 2. Fgf10 and Fgf3/SOX3 expression in the forming infundibulum and collar zone. (A-C) Anterior fp subpopulations (A and P) used in targeted fate mapping (A) were explanted and cultured in vitro (B) for 30 hours (E2.5 equivalent). The anterior (prosencephalic neck)-derived population expresses Fg ...
Identification of a Cell Cycle-Related Cene, Cyclin, in Nicotiana
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... by phytohormones. These include protoplast cultures and cell suspensions that can be synchronized during cell-cycle progression (Nagata et al., 1992). &o, epidermal tobacco tissues may be confined in vitro to produce, selectively, flowers, vegetative buds, roots, or calli in response to exogenous ph ...
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Downloadable Full Text - DSpace@MIT
Downloadable Full Text - DSpace@MIT

... gave rise to chimeras that transmitted the mutant allele. To generate UTX-null animals, conditional mutant males with the germ-line active Nestin-cre allele (see experimental procedures) were crossed with UtxKO/Wt females to generate a 1:1:1:1 expected ratio of Utxwt and UtxKO males and UtxKO/Wt and ...
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Cellular Structure and Function
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... c-Myc, a basic ± helix ± loop ± helix ± leucine ± zipper (bHLH ± ZIP) transcription factor, plays critical roles in proliferation, di€erentiation, transformation, and apoptosis (Henriksson and LuÈscher, 1996; Facchini and Penn, 1998; Nesbit et al., 1999). c-Myc is highly expressed during proliferati ...
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... • Associated with the morphological asymmetry is that chemical synapses are, for the most part, unidirectional. • There is a delay of ~0.3 – 5 msec between the arrival of information at the presynaptic terminal and its transfer to the postsynaptic cell. This delay may reflect the several steps requi ...
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... function in chromosome segregation by promoting normal kinetochore attachment of chromosomes to the spindle (Shanks et al. 2001, 2004; Jin et al. 2012) and for mediating anti-parallel interactions of interpolar nuclear MTs (Gardner et al. 2008). During mating, Kar3 plays an ...
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... sequences; these differentially control localization of Dscam1 proteins to axons and dendrites (Wang et al. 2004, Shi et al. 2007, Yang et al. 2008). Finally, alternative splicing also generates different variants of the cytoplasmic domain, although how these variants contribute to Dscam1 function i ...
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... PATHOLOGY OF THE RESPIRATORY SYSTEM ...
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... where the amount of fixed carbon sources for growth and energy may be extremely low (Morita 1982).Being a chemolithotroph, this organism has the advantage of using an omnipresent carbon source (CO2)for building cellular material. Also, N. cryotolerans can utilize atmospheric sources of NH, (Jones & ...
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... Background. Laboratory rat strains vary significantly in their susceptibility to mammary carcinogenesis. Using a genetic backcross between the intermediately sensitive F344 strain (F344) and the resistant Copenhagen strain (Cop), we mapped a putative Mammary Carcinoma Susceptibility (Mcs) Locus to t ...
THE CEREBELLUM
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Root-knot nematodes manipulate plant cell functions during a
Root-knot nematodes manipulate plant cell functions during a

... plant species, probably by manipulating fundamental elements of plant cell development. Feeding cells enlarge and are converted into multinucleate giant cells through synchronous nuclear divisions without cell division. Fully differentiated giant cells may contain more than a hundred polyploid nucle ...
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Amitosis

Amitosis (a- + mitosis) is absence of mitosis, the usual form of cell division in the cells of eukaryotes. There are several senses in which eukaryotic cells can be amitotic. One refers to capability for non-mitotic division and the other refers to lack of capability for division. In one sense of the word, which is now mostly obsolete, amitosis is cell division in eukaryotic cells that happens without the usual features of mitosis as seen on microscopy, namely, without nuclear envelope breakdown and without formation of mitotic spindle and condensed chromosomes as far as microscopy can detect. However, most examples of cell division formerly thought to belong to this supposedly ""non-mitotic"" class, such as the division of unicellular eukaryotes, are today recognized as belonging to a class of mitosis called closed mitosis. A spectrum of mitotic activity can be categorized as open, semi-closed, and closed mitosis, depending on the fate of the nuclear envelope. An exception is the division of ciliate macronucleus, which is not mitotic, and the reference to this process as amitosis may be the only legitimate use of the ""non-mitotic division"" sense of the term today. In animals and plants which normally have open mitosis, the microscopic picture described in the 19th century as amitosis most likely corresponded to apoptosis, a process of programmed cell death associated with fragmentation of the nucleus and cytoplasm. Relatedly, even in the late 19th century cytologists mentioned that in larger life forms, amitosis is a ""forerunner of degeneration"".Another sense of amitotic refers to cells of certain tissues that are usually no longer capable of mitosis once the organism has matured into adulthood. In humans this is true of various muscle and nerve tissue types; if the existing ones are damaged, they cannot be replaced with new ones of equal capability. For example, cardiac muscle destroyed by heart attack and nerves destroyed by piercing trauma usually cannot regenerate. In contrast, skin cells are capable of mitosis throughout adulthood; old skin cells that die and slough off are replaced with new ones. Human liver tissue also has a sort of dormant regenerative ability; it is usually not needed or expressed but can be elicited if needed.
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