Results 11 to 20 of about 308,164 (234)
How many metals does it take to fix N2? A mechanistic overview of biological nitrogen fixation [PDF]
, 2006 During the process of biological nitrogen fixation, the enzyme nitrogenase catalyzes the ATP-dependent reduction of dinitrogen to ammonia. Nitrogenase consists of two component metalloproteins, the iron (Fe) protein and the molybdenum-iron (MoFe) protein;
Howard, James B., Rees, Douglas C.
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Identity and function of an essential nitrogen ligand of the nitrogenase cofactor biosynthesis protein NifB. [PDF]
, 2020 NifB is a radical S-adenosyl-L-methionine (SAM) enzyme that is essential for nitrogenase cofactor assembly. Previously, a nitrogen ligand was shown to be involved in coupling a pair of [Fe4S4] clusters (designated K1 and K2) concomitant with carbide ...
Britt, R David +7 more
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The role of algebraic solutions in planar polynomial differential systems [PDF]
, 2005 We study a planar polynomial differential system, given by \dot{x}=P(x,y), \dot{y}=Q(x,y). We consider a function I(x,y)=\exp \{h_2(x) A_1(x,y) \diagup A_0(x,y) \} h_1(x) \prod_{i=1}^{\ell} (y-g_i(x))^{\alpha_i}, where g_i(x) are algebraic functions, A_1(
Giacomini, Héctor +2 more
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Molecular architecture of human polycomb repressive complex 2. [PDF]
, 2012 Polycomb Repressive Complex 2 (PRC2) is essential for gene silencing, establishing transcriptional repression of specific genes by tri-methylating Lysine 27 of histone H3, a process mediated by cofactors such as AEBP2.
Aebersold, Ruedi +5 more
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eLife, 2016 The metallocofactor involved in fixing nitrogen is not a rigid scaffold, as was previously thought.
Wittenborn, Elizabeth Charlot +2 more
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Non-Hamiltonian systems separable by Hamilton-Jacobi method
, 2007 We show that with every separable calssical Stackel system of Benenti type on a Riemannian space one can associate, by a proper deformation of the metric tensor, a multi-parameter family of non-Hamiltonian systems on the same space, sharing the same ...
Beltrami +20 more
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Cofactor and Cofactor Mimetics
Blood, 2019 Many natural enzymes need the assistance of protein cofactors to catalyze chemical reactions at a physiologically relevant speed and several of the enzymes that make up for the coagulation cascade are no exception in this regard. Notably, activated factors VII, IX and X display relatively poor enzymatic activity towards their respective macromolecular ...
openaire +2 more sources
Texture and Cofactor Zeros of the Neutrino Mass Matrix
, 2014 We study Majorana neutrino mass matrices that have two texture zeros, or two cofactor zeros, or one texture zero and one cofactor zero. The two texture/cofactor zero conditions give four constraints, which in conjunction with the five measured ...
Liao, Jiajun, Marfatia, D., Whisnant, K.
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Deutsches Ärzteblatt international, 2011 The article described very competently the diagnostic evaluation and therapy of dyslexia from the perspective of child and adolescent psychiatry. In order to be able to assess the child in its entire cognitive-language learning development and not only with regard to the acquisition of written language competencies, the importance of peripheral ...
openaire +3 more sources
Cofactor regeneration by a soluble pyridine nucleotide transhydrogenase for biological production of hydromorphone [PDF]
, 2000 We have applied the soluble pyridine nucleotide transhydrogenase of Pseudomonas fluorescens to a cell-free system for the regeneration of the nicotinamide cofactors NAD and NADP in the biological production of the important semisynthetic opiate drug ...
Boonstra, B +4 more
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