نتایج جستجو برای: spindle

تعداد نتایج: 26260  

2014
Sarah Young Sébastien Besson Julie P. I. Welburn

Spindle length varies dramatically across species and during early development to segregate chromosomes optimally. Both intrinsic factors, such as regulatory molecules, and extrinsic factors, such as cytoplasmic volume, determine spindle length scaling. However, the properties that govern spindle shape and whether these features can be modulated remain unknown. Here, we analyzed quantitatively ...

Journal: :iranian journal of radiation research 0
j.k. kim korea atomic energy research institute (kaeri), jeongeup, 580-185, republic of korea m. cha korea atomic energy research institute (kaeri), jeongeup, 580-185, republic of korea a. mukherjee department of botany, university of calcutta, kolkata-700 019, india n. wilhelmová institute of experimental botany, ascr, prague 160 00, czech republic

background: spindle trees (euonymus japonica thunb.) growing in an industrial complex area containing pollutants is chronically injured thus need to build up their resistance. antioxidant enzymes and cell membrane stability have been widely used to differentiate stress tolerance. materials and methods: leaves of spindle trees from a clean control area (kijang) and an industrial area (onsan) whe...

Journal: :The Journal of Cell Biology 2008
Marianne Uteng Christian Hentrich Kota Miura Peter Bieling Thomas Surrey

Molecular motors are required for spindle assembly and maintenance during cell division. How motors move and interact inside spindles is unknown. Using photoactivation and photobleaching, we measure mitotic motor movement inside a dynamic spindle. We find that dynein-dynactin transports the essential motor Eg5 toward the spindle poles in Xenopus laevis egg extract spindles, revealing a direct i...

Journal: :Cell Cycle 2011

2017
Yili Zhu Xiaojing An Alexis Tomaszewski Peter K Hepler Wei-Lih Lee

Dynein mediates spindle positioning in budding yeast by pulling on astral microtubules (MTs) from the cell cortex. The MT-associated protein She1 regulates dynein activity along astral MTs and directs spindle movements toward the bud cell. In addition to localizing to astral MTs, She1 also targets to the spindle, but its role on the spindle remains unknown. Using function-separating alleles, li...

Journal: :iranian journal of pathology 2008
farnoosh azadbakht fahimeh asadi-amoli easa jahanzad ali sadeghie-tari mojgan akbarzadeh-jahromi

background and objective: inflammatory pseudotumor  is a lesion composed of proliferating spindle cells with mixed inflammatory infiltrates. some authors have proposed the name inflammatory myofibroblastic tumor as a proper descriptive term rather than the vague inflammatory pseudotumor. the aim of this study was to verify the myofibroblastic origin of spindle cells in idiopathic orbital inflam...

Cerna R Kubelka M Pesanova D Susor A

Background: Fully grown mammalian oocyte utilizes transcripts synthetized and stored during earlier development. In the mouse oocyte there are three forms of cap-dependent translational repressors: 4E-BP1, 4E-BP2, and 4E-BP3. The dominant form, 4E-BP1, inhibits cap-dependent translation by binding to the eIF4E translation initiation factor. Hyperphosphorylation of 4E-BP1 disrupts this inhibitor...

Journal: :The Journal of Cell Biology 1979
D A Begg G W Ellis

We have used micromanipulation to study the attachment of chromosomes to the spindle and the mechanical properties of the chromosomal spindle fibers. Individual chromosomes can be displaced about the periphery of the spindle, in the plane of the metaphase plate, without altering the structure of the spindle or the positions of the nonmanipulated chromosomes. From mid-prometaphase through the on...

ژورنال: :مجله دانشگاه علوم پزشکی بابل 0
عفت برقی، e barghi بابل، دانشگاه علوم پزشکی، گروه فیزیولوژی و فارماکولوژی، تلفن: 4-2229591- 0111، [email protected] ابراهیم میکانیکی e mikaniki

سابقه و هدف : تجربیات انجام شده برروی دوک عضلانی(muscle spindle( ms موجود در عضله سولئوس در موشهای بیهوش شده نشان داده است که، بعد از تحت تاثیر قرار دادن این عضله با محرک کشش آهسته( slow stretch( ss مکانیکی، ms موجود در این عضله در یک وضعیت سکون slack باقی مانده است و یا به عبارتی ms فاقد فعالیت بوده است. این حالت سکون یعنی عدم فعالیت الکترومکانیکی ms را هم چنین در ms ایزوله مشاهده نمودند و این...

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