The mechanism for the basal targeting of the Miranda (Mira) complex during the asymmetric division of Drosophila neuroblasts (NBs) is yet to be fully understood. We have identified conserved Phosphotyrosyl phosphatase activator (PTPA) as a novel mediator for the basal localization of the Mira complex in larval brain NBs. In mutant Ptpa NBs, Mira remains cytoplasmic during early mitosis and its ...

Cell contractility and migration by integrins depends on precise regulation of protein tyrosine kinase and Rho-family GTPase activities in specific spatiotemporal patterns. Here we show that protein tyrosine phosphatase PTP1B cooperates with β3 integrin to activate the Src/FAK signalling pathway which represses RhoAmyosin-dependent contractility. Using PTP1B null (KO) cells and PTP1B reconstitu...

Patients with suspected complications of gallstone disease should be evaluated for alternative diagnoses, as well as complications of gallstones such as pancreatitis and cholangitis. Laboratory evaluation for all these patients should include a complete blood count, basic serum chemistries, liver function tests, serum amylase and lipase, and urinalysis. A urine pregnancy test should always be p...

A long-standing question in the planetary sciences asks what the Earth is made of. For historical reasons, volatile-depleted primitive materials similar to current chondritic meteorites were long considered to provide the `building blocks' of the terrestrial planets. But material from the Earth, Mars, comets and various meteorites have Mg/Si and Al/Si ratios, oxygen-isotope ratios, osmium-isoto...

اگرچه جهش اخلاقی در رمان و نقد ادبی دو دهه‌ی اخیر از سوی شماری منتقدین، فیلسوفان نظریه‌پردازان تصدیق می شود، اما همچنان ماهیت کم‌وکیف آن نامشخص است نیاز به ارزیابی تحلیلی ویژه دارد. این رو، مقاله بر تا چهارچوب جدیدی اخلاق را که حاکی گذر پسا‌مدرنیسم پساپسا‌مدرنیسم است، نماید. بدین منظور، قهرمانان مرزها (2016) اثر دیو اگرز، نویسنده‌‌ی معاصر آمریکایی، بررسی می‌شود. دنیایی به‌تصویر کشیده می‌شود مرد...

(44)Ti/(44)Sc radionuclide generators are of interest for molecular imaging. The 3.97 hours half-life of (44)Sc and its high positron branching of 94.27% may stimulate the application of (44)Sc-labeled PET radiopharmaceuticals. This review describes the current status of (44)Ti production, (44)Ti/(44)Sc radionuclide generator development, post-processing of generator eluates towards medical app...