• Study Resource
  • Explore Categories
    • Arts & Humanities
    • Business
    • Engineering & Technology
    • Foreign Language
    • History
    • Math
    • Science
    • Social Science

    Top subcategories

    • Advanced Math
    • Algebra
    • Basic Math
    • Calculus
    • Geometry
    • Linear Algebra
    • Pre-Algebra
    • Pre-Calculus
    • Statistics And Probability
    • Trigonometry
    • other →

    Top subcategories

    • Astronomy
    • Astrophysics
    • Biology
    • Chemistry
    • Earth Science
    • Environmental Science
    • Health Science
    • Physics
    • other →

    Top subcategories

    • Anthropology
    • Law
    • Political Science
    • Psychology
    • Sociology
    • other →

    Top subcategories

    • Accounting
    • Economics
    • Finance
    • Management
    • other →

    Top subcategories

    • Aerospace Engineering
    • Bioengineering
    • Chemical Engineering
    • Civil Engineering
    • Computer Science
    • Electrical Engineering
    • Industrial Engineering
    • Mechanical Engineering
    • Web Design
    • other →

    Top subcategories

    • Architecture
    • Communications
    • English
    • Gender Studies
    • Music
    • Performing Arts
    • Philosophy
    • Religious Studies
    • Writing
    • other →

    Top subcategories

    • Ancient History
    • European History
    • US History
    • World History
    • other →

    Top subcategories

    • Croatian
    • Czech
    • Finnish
    • Greek
    • Hindi
    • Japanese
    • Korean
    • Persian
    • Swedish
    • Turkish
    • other →
 
Profile Documents Logout
Upload
Ciliary Microtubule Capping Structures Contain A
Ciliary Microtubule Capping Structures Contain A

... fixed at various times during the cell cycle. The 97-kD antibodies stained the kinetochore regions of interphase and mitotic cells (Fig. 6). Similar results were obtained with Chinese hamster ovary (CHO) and Indian muntjak cells (data not shown). Serum from a diffuse scleroderma patient that does no ...
Methods for studying root colonization by introduced beneficial
Methods for studying root colonization by introduced beneficial

... GFP characterized by its short half-life. The unstable GFP has been constructed by the addition of a short peptide sequence to the C-terminal end of the intact GFP: this modification allows its degradation by bacterial endogenous proteases. Since the GFP produced during bacterial growth does not acc ...
Global phosphoproteomic effects of natural tyrosine kinase inhibitor
Global phosphoproteomic effects of natural tyrosine kinase inhibitor

Plasticity in Cell Division Patterns and Auxin
Plasticity in Cell Division Patterns and Auxin

... Symmetrically divided microspores and the symmetrically divided vegetative cell of binucleate pollen are reported to form haploid embryos in B. napus (Fan et al., 1988; Zaki and Dickinson, 1990). We observed GRP-driven GFP expression in these symmetrically divided cell types (Figures 2A and 2B), whi ...
Suppressor analysis of the protein kinase Elm1p, an enzyme
Suppressor analysis of the protein kinase Elm1p, an enzyme

... of the opposite mating type. Intrinsic factors are genetically programmed, and depend on the mating type of the cells. The intrinsic bud-site selection of haploid cells is the axial pattern, in which the mother and daughter cells initiate new buds proximally to each other (17,21,33,93,137). A chitin ...
Role of Phospholipase D in the cAMP Signal Transduction Pathway
Role of Phospholipase D in the cAMP Signal Transduction Pathway

... 1 rain, and the organic lower phase (50 I.d) was spotted onto the preadsorbent layer of pregrooved plates (LK6D; Whatman Inc., Clifton, NJ). The plates were developed in petroleum ether/diethyl ether/acetic acid (75:25: 1, vol/vol). The region corresponding to free arachidonic acid was visualized by ...
Dynamics of the Cell Cycle: Checkpoints, Sizers, and Timers
Dynamics of the Cell Cycle: Checkpoints, Sizers, and Timers

... insight into this most fundamental biological process. A number of mathematical models (Aguda, 1999; Aguda and Tang, 1999; Chen et al., 2000; Gardner et al., 1998; Goldbeter, 1991; Hatzimanikatis et al., 1999; Novak and Tyson, 1997; Obeyesekere et al., 1997; Qu et al., 2003; Sveiczer et al., 2000; T ...
Fetal Endoderm Primarily Holds the Temporal and Positional
Fetal Endoderm Primarily Holds the Temporal and Positional

... digestive enzyme activities in isografts of fetal intestinal implants, that the timing of intestinal development is primarily directed by an autonomous program (Ferguson et al., 1973; Kendall et al., 1979; Montgomery et al., 1981), Yet, modulation of this program may occur by extrinsic factors such ...
Ixodes scapularis the Saliva of the Lyme Disease Vector Tick
Ixodes scapularis the Saliva of the Lyme Disease Vector Tick

... to humans and livestock (reviewed in Ref. 7 and 21). Much attention has been given to the nature of the immune response to ticks as well as to the effects of tick infestations on the host’s immune competence (7, 9, 21). Tick infestation of mice has been shown to result in significant modulations of ...
Cytochrome c Oxidase dysfunction in cancer
Cytochrome c Oxidase dysfunction in cancer

... when an electron and a proton is transferred to the catalytic site. The F3 intermediate decays into the fully oxidized O 4(0) state when another electron and a proton is transferred to the catalytic site. Subsequent transfer of two protons and two electrons results in formation of water and reductio ...
Involvement of CD14 and Complement Receptors CR3 and CR4 in
Involvement of CD14 and Complement Receptors CR3 and CR4 in

... LPS and GBS induce TNF production from human monocytes in a CD14-dependent manner, and human serum, LBP, and sCD14 enhance the response In the first series of experiments, we compared the capacities of LPS and GBS to induce TNF from human monocytes and evaluated the roles of membrane and sCD14 as we ...
Bleaching Chemiclas for the Kraft Pulping Industry
Bleaching Chemiclas for the Kraft Pulping Industry

... The hypo system is used to remove chlorine from process streams before they are vented to atmosphere and is also used to safely dispose of chlorine during process upsets such as shut downs and power failures. THE ROLE OF THE LABORATORY The chemical plant is an area where chemical reactions and elec ...
Mechanism of isoniazid uptake in Mycobacterium
Mechanism of isoniazid uptake in Mycobacterium

... Before studying the transport of INH, we addressed two obvious experimental difficulties with mycobacteria. (i) Most species are known to form aggregates, rendering quantification of the biomass in aliquots difficult. This was solved by using background labelling of cells by [3H]uracil; then the cou ...
Document
Document

... Upper Panel: Nomarski photomicrograph of one gonad arm of an adult C. elegans hermaphrodite. The distal portion of the gonad arm is up; the proximal portion is down. Lower Panel: Nomarski photomicrograph of an adult C. elegans male gonad. The distal portion of the testis is above; the proximal regi ...
Encoding and processing of sensory information
Encoding and processing of sensory information

... parameters of the electric carrier signal generated by the electric organ of wave-type fish are thought to be used for electrolocation and electrocommunication: phase shifts and amplitude modulations. A second decisive advantage is that the anatomy, electrophysiology and behavior of wave-type electr ...
PDF
PDF

... infected cell. Through simple variation in the nuclear to budding cycle sequence, apicomplexan parasites have solved the problem of adjusting proliferation to a wide variety of host cells. What is not understood are the mechanistic details that afford this tremendous cell division flexibility, while ...
VEGF - Science Mission
VEGF - Science Mission

... induces sprouting of nearby lymphatic vessels, facilitating the access of tumor cells into the vessel lumen. b, Aggregates of tumour cells are transported to the regional lymph node, from which they can spread to distant organs through either blood or lymphatic vessels. Blockage of VEGFR-3 signallin ...
Role of Adenosine in Response to Vascular Inflammation
Role of Adenosine in Response to Vascular Inflammation

... Downloaded from http://atvb.ahajournals.org/ by guest on June 17, 2017 ...
Infectious particles, stress, and induced prion amyloids
Infectious particles, stress, and induced prion amyloids

... start or “seed” the amyloidogenic process. These amyloid conversion reactions, sequentially replenished with uninfected material, such as normal brain homogenates, typically generate enormous amounts of PrP-res with little, or no infectivity. Thus the misfolded PrP-res protein alone is not necessari ...
Cell fate specification and polarisation in mouse preimplantation
Cell fate specification and polarisation in mouse preimplantation

... This thesis may be made available for consultation within the University Library and may be photocopied or lent to other libraries for the purposes of consultation with effect from ………………….. Signed on behalf of the Faculty of Science …………………….. ...
Xror2 modulates convergent extension
Xror2 modulates convergent extension

... and can initiate expression of the organizer-specific genes goosecoid (gsc), chordin and Xotx2, in animal caps (Agulnick et al., 1996; Mochizuki et al., 2000; Taira et al., 1994; Taira et al., 1997), suggesting that Xlim-1 is involved in the functions of the organizer. Using differential screening, ...
the diversity of plastid - University of Wisconsin Oshkosh
the diversity of plastid - University of Wisconsin Oshkosh

... enough information to code for about 100 of their approximately 2,500 proteins; all other plastid proteins are coded for by the nuclear genome and imported from the cytoplasm. Plastids divide via fission prior to cytokinesis and are equally apportioned between the two daughter cells, along with the ...
Tendon development and musculoskeletal assembly: emerging
Tendon development and musculoskeletal assembly: emerging

... connectivity lies, within the TPCs or within the muscles themselves? Chick-quail chimera studies suggests that, at least for cranial and limb muscles, the TPCs and tendon matrix determine the pattern of attachments (Kardon, 1998; Kieny and Chevallier, 1979; Noden, 1988). Do muscles and the myomatrix ...
r-Gir - Microbiology
r-Gir - Microbiology

... explanation of this model. They demonstrated that nascent chitin is synthesized in relatively amorphous strands which become thicker as chitin chains accrete by hydrogen bonding to form microfibrils. These are then cross-linked gradually to glucan chains in sub-apical regions of the hyphae. In non-g ...
Sucrose Cleavage Pathways in Aspen Wood
Sucrose Cleavage Pathways in Aspen Wood

... showed the localization of SUS in cytosol, mitochondria and nuclei (Subbaiah et al., 2006). In another example, co-immuno-detection of Arabidopsis SUS2 and E37 which is a polypeptide of the inner plastid envelope showed SUS association with plastids of Arabidopsis thaliana embryo, endosperm and seed ...
< 1 ... 69 70 71 72 73 74 75 76 77 ... 1231 >

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.
  • studyres.com © 2025
  • DMCA
  • Privacy
  • Terms
  • Report