منابع مشابه
Crystal structure of the dipeptide cyclo(glycyl-l-glutamine).
that produces opioid-like effects on the central nervous system.1 Cleavage of the β-endorphin C-terminal in the brain and pituitary gland yields the biologically active dipeptide glycyl-Lglutamine (Gly-L-Gln, β-endorphin 30-31), which inhibits βendorphin-induced cardiorespiratory depression.2,3 The stereospecificity of this effect is evident, since Gly-D-Gln has recently been reported to be ina...
متن کاملStructure of the human cyclo-oxygenase-2 gene.
Cyclo-oxygenase (Cox), a rate-limiting enzyme in the synthesis of prostanoids, is encoded by two genes, Cox-1 and Cox-2, which are differentially expressed and regulated. Human Cox-1 and -2 polypeptides share 61% primary sequence identity. While the expression of Cox-1 is maximal in quiescent cells. Cox-2 expression is induced by growth factors and cytokines. We have screened a human genomic li...
متن کاملStructure of (5'S)-8,5'-cyclo-2'-deoxyguanosine in DNA.
Diastereomeric 8,5'-cyclopurine 2'-deoxynucleosides, containing a covalent bond between the deoxyribose and the purine base, represent an important class of DNA damage induced by ionizing radiation. The 8,5'-cyclo-2'-deoxyguanosine lesion (cdG) has been recently reported to be a strong block of replication and highly mutagenic in Escherichia coli. The 8,5'-cyclopurine-2'-deoxyriboses are suspec...
متن کاملStructure of 5-formyltetrahydrofolate cyclo-ligase from Bacillus anthracis (BA4489)
Bacillus anthracis is a spore-forming bacterium and the causative agent of the disease anthrax. The Oxford Protein Production Facility has been targeting proteins from B. anthracis in order to develop high-throughput technologies within the Structural Proteomics in Europe project. As part of this work, the structure of 5-formyltetrahydrofolate cyclo-ligase (BA4489) has been determined by X-ray ...
متن کاملthe structure of lie derivations on c*-algebras
نشان می دهیم که هر اشتقاق لی روی یک c^*-جبر به شکل استاندارد است، یعنی می تواند به طور یکتا به مجموع یک اشتقاق لی و یک اثر مرکز مقدار تجزیه شود. کلمات کلیدی: اشتقاق، اشتقاق لی، c^*-جبر.
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ژورنال
عنوان ژورنال: Nature
سال: 1948
ISSN: 0028-0836,1476-4687
DOI: 10.1038/161165a0