نتایج جستجو برای: hat shape structure

تعداد نتایج: 1729879  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شهید باهنر کرمان 1376

این رساله از سه فصل تشکیل شده است . در فصل اول تعدادی از تعاریف و قضایای مقدماتی آمده است که در سراسر رساله مورد استفاده قرار گرفته است . در فصل دوم سعی شده است که با ارائه یک مدل ساده از ورزدادن خمیر به نظریه آشوب وارد شد و سپس با مدل بندی کردن ورزدادن خمیر تابع hat معرفی شده است . در فصل سوم ابتدا به تعریف اصطلاحات کلیدی نظریه آشوب پرداخته شده است و این فصل با مطالعه رفتار تابع hat به پایان ر...

پایان نامه :وزارت بهداشت، درمان و آموزش پزشکی - دانشگاه علوم پزشکی و خدمات بهداشتی درمانی مشهد - دانشکده دندانپزشکی 1393

چکیده: مقدمه و هدف: آگاهی از آناتومی کانال خصوصاً در آناتومی های پیچیده مثل کانال های c-shape برای انجام یک درمان موفق ضروری می باشد. از آنجا که در کانال های c-shape نحوه ارتباط از کرونال تا آپیکال در نحوه درمان انجام شده مهم است تشخیص وضعیت آناتومیک این کانال ها می تواند اهمیت زیادی داشته باشد. در این مطالعه، مقایسه ای بین پنج روش مختلف برای تشخیص آناتومی c-shape انجام گرفته تا روشی دقیق برای...

Journal: :EMBO reports 2001
A Akhtar P B Becker

Site-specific acetylation of histone H4 by MOF is central to establishing the hyperactive male X chromosome in Drosophila. MOF belongs to the MYST family of histone acetyltransferases (HATs) characterized by an unusual C2HC-type zinc finger close to their HAT domains. The function of these rare zinc fingers is unknown. We found that this domain is essential for HAT activity, in addition to the ...

Journal: :Molecular and cellular biology 2006
Anke Hoffmann Thomas Barz Dietmar Spengler

Zac is a C(2)H(2) zinc finger protein that regulates apoptosis and cell cycle arrest through DNA binding and transactivation. The coactivator proteins p300/CBP enhance transactivation through their histone acetyltransferase (HAT) activity by modulating chromatin structure. Here, we show that p300 increases Zac transactivation in a strictly HAT-dependent manner. Whereas the classic recruitment m...

Journal: :Virology 2001
L Deng D Wang C de la Fuente L Wang H Li C G Lee R Donnelly J D Wade P Lambert F Kashanchi

HIV-1 Tat is able to form a ternary complex with P/CAF and p300 and increase the affinity for CDK9/P-TEFb CTD kinase complex. Our previous study demonstrated that Tat binds to p300/CBP in the minimal HAT domain (aa 1253-1790) and that the interaction results in a change of conformation on p300/CBP. Here, we show that the Tat-p300 interaction increases the HAT activity of p300 on histone H4 that...

Journal: :Nucleic Acids Research 2005
Shigehiro Osada Mitsumasa Kurita Jun-ichi Nishikawa Tsutomu Nishihara

Transcriptional repression of the silent mating-type loci HMLalpha and HMRa in Saccharomyces cerevisiae is regulated by chromatin structure. Sas2p is a catalytic subunit of the SAS histone acetyltransferase (HAT) complex. Although many HATs seem to relieve chromosomal repression to facilitate transcriptional activation, sas mutant phenotypes include loss of SIR1-dependent silencing of HMLalpha....

2011
Jessica Sarthi Felice Elefant

BACKGROUND Histone acetylation of chromatin plays a key role in promoting the dynamic transcriptional responses in neurons that influence the neuroplasticity linked to cognitive ability, yet the specific histone acetyltransferases (HATs) that create such epigenetic marks remain to be elucidated. METHODS AND FINDINGS Here we use the Drosophila neuromuscular junction (NMJ) as a well-characteriz...

2013
Caitlin Sedwick

JCB • VOLUME 203 • NUMBER 3 • 2013 378 W hat can you learn about a cell just by looking at it? Quite a lot, as it turns out. A cell’s shape can tell you about its behavior and its function in the body, just for a start. And, as Chris Bakal can attest, a cell’s shape can also tell you a lot about the signaling pathways at work. Bakal has been interested in cellular signaling pathways ever since ...

Journal: :Neuron 2004
Edward Korzus Michael G Rosenfeld Mark Mayford

The stabilization of learned information into long-term memories requires new gene expression. CREB binding protein (CBP) is a coactivator of transcription that can be independently regulated in neurons. CBP functions both as a platform for recruiting other required components of the transcriptional machinery and as a histone acetyltransferase (HAT) that alters chromatin structure. To dissect t...

Journal: :international journal of advanced structural engineering 2010
kamal m. bajoria surajit das

the pseudo-elastic behavior of shape memory alloy (sma) truss and cantilever beam are investigated. brinson’s one-dimensional material model, which uses the twinned and detwinned martensite fractions separately as internal variables, is applied in the algorithm to establish the sma stress-strain characteristics. this material model also incorporates different young’s modulus for austenitic and ...

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