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Type XIII collagen. Structural and functional characterization of the
Type XIII collagen. Structural and functional characterization of the

... as a homotrimer. The recombinant protein was found to reside in the plasma membrane of insect cells with its N-terminus intracellular and C-terminal part extracellular, i. e. in a type II orientation. The trimerization of type XIII collagen chains was initiated by 21 amino acid residues adjacent to ...
single cotyledon (sic) mutants of pea and their significance in
single cotyledon (sic) mutants of pea and their significance in

... embryo has only a single plane of symmetry, in contrast to many dicots. To clarify this point, a dorsal-ventral concept from animal embryology was adopted to describe the morphology of the pea embryo. The ventral side was where the apical meristem was situated, which was close to the testa in vivo. ...
Organisation of Xenopus oocyte and egg cortices
Organisation of Xenopus oocyte and egg cortices

... and Etkin, 1995). A first set arrives in association with the mitochondrial cloud. This includes all the germ plasm associated mRNAs mentioned above along with Xwnt11 and Xlsirt, a non-coding, repetitive sequence RNA (Kloc and Etkin, 1994). Different transcripts take up different positions within th ...
Root cap development in rice CORRESPONDING AUTHOR
Root cap development in rice CORRESPONDING AUTHOR

... columella root cap stem cell daughter cell at the lower tier through an anticlinal division and eventually form the entire column of columella root cap cells (Fig. 2F). Lateral root cap cells, on the other hand, appeared to be originated from stem cells unrelated to the columlla root cap lineage, as ...
Regulation of the Intermediate Filament Protein Nestin at Rodent
Regulation of the Intermediate Filament Protein Nestin at Rodent

... Nestin is a large, 200 kDa, IF protein originally identified by the rat 401 antibody (Hockfield and McKay, 1985; Lendahl et al., 1990). Nestin has been shown to be expressed in a wide variety of cells, including cells in the proliferative zone of the rat neural tube (Hockfield and McKay, 1985), radi ...
Polarization of the endomembrane system is an early event in fucoid
Polarization of the endomembrane system is an early event in fucoid

... in the apical cytoplasm has been previously reported for other tip-growing cells, including Fucus zygotes [2023,27]. In fucoid zygotes the developmental axis is initially labile and can be reoriented by changing the direction of the orienting vector [28,29]. To determine whether endomembrane asymmet ...
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PDF

... domain (Riemer et al., 1993). An extensive biochemical and immunological search suggested the existence of only a single lamin protein in the mollusc Spisula soldissima (Dessev and Goldman, 1990). Also, the arthropod Drosophila melanogaster has long been thought to contain only a single nuclear lami ...
Running Head: Superresolution of cortical
Running Head: Superresolution of cortical

... at video rates (Marc et al., 1998; Shaw et al., 2013). However, the bulk of plant cells organized ...
BIOACCUMULATION OF METAL CATIONS BY YEAST AND YEAST
BIOACCUMULATION OF METAL CATIONS BY YEAST AND YEAST

... loss of 70% of the intracellular potassium, implying permeation of the plasma membrane. ...
The Glia of Caenorhabditis elegans - Shaham Lab
The Glia of Caenorhabditis elegans - Shaham Lab

... Animal nervous systems promote a spectacular range of functions, from simple reflexive escape behaviors, to complex cognitive tasks. The diversity of animal behavior is executed through signals speeding down neurons connected in complex ways, and tasked with sensing stimuli, analyzing sensory input, ...
Maize meiotic mutants with improper or non
Maize meiotic mutants with improper or non

... During meiotic prophase homologous chromosomes find each other and pair. Then they synapse, as the linear protein core (axial element or lateral element) of each homologous chromosome is joined together by a transverse central element, forming the tripartite synaptonemal complex (SC). Ten uncloned Z ...
THE ROLE OF NODAL SIGNALING IN PATTERNING THE
THE ROLE OF NODAL SIGNALING IN PATTERNING THE

... Interestingly, when the animal caps were cultured with ventral or dorsal vegetal pole, they gave rise to different types of mesoderm (Harland and Gerhart, 1997; Kimelman and Griffin, 2000). When animal caps were cultured with ventral vegetal cells, they produced ventral mesoderm, including blood pre ...
The Drosophila Sec7 domain guanine nucleotide exchange factor
The Drosophila Sec7 domain guanine nucleotide exchange factor

... Protein trafficking through the secretory pathway plays a key role in epithelial organ development and function. The expansion of tracheal tubes in Drosophila depends on trafficking of coatomer protein complex I (COPI)-coated vesicles between the Golgi complex and the endoplasmic reticulum (ER). How ...
Interactions of Elongation Factor 1 Cell Protrusions with F-Actin and
Interactions of Elongation Factor 1 Cell Protrusions with F-Actin and

... Bassell et al., 1998). The involvement of EF1␣ in mRNA localization is also suggested from in vivo studies. For example, Bni1p, a yeast protein that is involved in the asymmetric localization of ASH1 mRNA in the daughter cell (Long et al., 1997), has been identified as an EF1␣-binding protein (Umika ...
Apical-basal patterning in Arabidopsis - Development
Apical-basal patterning in Arabidopsis - Development

... the cotyledons and the root meristem, respectively. The current view of apical-basal pattern formation is largely based on the analysis of mutant embryo phenotypes. gnom mutations affect the division of the zygote and destabilise the entire axis (Mayer et al., 1993; Vroemen et al., 1996) whereas oth ...
Live Imaging of Drosophila Brain Neuroblasts Reveals a Role for
Live Imaging of Drosophila Brain Neuroblasts Reveals a Role for

... An essential step during mitotic cell division involves the equal partitioning of the genetic material between both daughter cells. Correct chromosome segregation requires attachment of microtubules (MTs) emanating from spindle poles to kinetochores, multiprotein complexes assembled on centromeres o ...
Homologous pairing and the role of pairing centers in meiosis
Homologous pairing and the role of pairing centers in meiosis

... Specific, but similar, target sequences for each of the zinc-finger proteins have recently been identified and found to be enriched in the PC regions of the appropriate chromosomes. These sequences are repeats of varying length and spacing that all have similar 12-bp core sequences, which have been ...
Factor of Transcription by Upstream Binding CAST/hPAF49 Has a
Factor of Transcription by Upstream Binding CAST/hPAF49 Has a

... produce the major ribosomal RNAs, a process inextricably linked to ribosome biogenesis and cell growth (reviewed in reference 29). Detailed information of the composition of the Pol I complex has come from genetic and biochemical studies in yeast (4). Yeast Pol I is a complex of ⬃600 kDa, comprised ...
Occlusive thrombi arise in mammals but not birds in
Occlusive thrombi arise in mammals but not birds in

... Birds have blood pressures higher than those of mammals, and the hemodynamic forces in avian arteries match or exceed those in mammals 8,9. Thus the hemostatic requirement of birds is predicted to be very similar to that of mammals. Birds generate larger, nucleated blood cells known as thrombocytes ...
Isolation and characterization of the Pin1/Ess1p homologue in
Isolation and characterization of the Pin1/Ess1p homologue in

... activity in human tumor cells and deletion of ESS1 in S. cerevisiae result in mitotic arrest (Lu et al., 1996; Rippmann et al., 2000). A Pin1 mutant lacking PPIase activity fails to complement the loss of ESS1 in yeast. Overexpression of Pin1 causes G2 arrest in HeLa cells (Lu et al., 1996), suggest ...
Airway surface liquid pH in well-differentiated airway - AJP-Cell
Airway surface liquid pH in well-differentiated airway - AJP-Cell

... below. Arterial blood (0.2–0.3 ml) was sampled through a PE-10 catheter inserted into the carotid artery, and blood pH and PCO2 were measured using a blood gas analyzer (Ciba Corning Diagnostic). After completion of the measurements, mice were euthanized by an overdose of pentobarbital (150 mg/kg). ...
Potential digestive function of bacteria in krill<br />Euthausia suerba stomach
Potential digestive function of bacteria in krill
Euthausia suerba stomach


... nutrient agar (Oxoid) prepared on an 'aged' seawater base (Zdanowski 1982, Zdanowski & Donachie 1993), referred to as NASW, after parallel incubation at 1 and 15°C for 15 d. Bacterial numbers are described in terms of AODC or CFU per g wet wt of stomach tissue. The latter are based on the means of t ...
Chromosome Dynamics in Meiotic Prophase I in
Chromosome Dynamics in Meiotic Prophase I in

... must pair, synapse, and recombine with each other [Zickler and Kleckner, 1999; Ronceret et al., 2007]. Homologous pairing is an interaction between chromosomes that leads to juxtaposition of homologs and the formation of bivalents [Zickler and Kleckner, 1999]. Synapsis closely follows pairing and i ...
Extracellular Traps Is a Silent Process Macrophage Clearance of
Extracellular Traps Is a Silent Process Macrophage Clearance of

... The online version of this article contains supplemental material. Abbreviations used in this article: CQ, chloroquine; HMDM, human monocyte–derived macrophage; HMGB1, high mobility group box 1; MPO, myeloperoxidase; NE, neutrophil elastase; NET, neutrophil extracellular trap; RT, room temperature; ...
Synthesis and Localization of Ciliary Neurotrophic Factor in the
Synthesis and Localization of Ciliary Neurotrophic Factor in the

... Total RNA from different regions of the lesioned and contralateral control sciatic nerves were isolated and processed for Northern blot according to Chomczynski and Sacchi (1987) as previously described (Stfckli et al., 1991): 26 picograms of a shortened synthetic CNTF-RNA standard covering the whol ...
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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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