Results 91 to 100 of about 20,977 (223)
, 2010 We present a comparison between Fe K-edge x-ray absorption spectra of carbonmonoxy-myoglobin and its simulation based on density-functional theory determination of the structure and vibrations and spectral simulation with multiple-scattering theory.
Boscherini, F. +6 more
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ChemPhysChem, Volume 27, Issue 8, 28 April 2026.Ultrafast pump‐probe spectroscopy of two evolutionarily divergent blue copper proteins reveals distinct low‐frequency ground‐state collective modes (38 cm−1 in SLAC, 29 cm−1 in azurin) generated via impulsive stimulated Raman scattering, potentially reflecting the differences in the rigidity of the surrounding protein scaffold beyond a conserved Cu ...
Luis Ignacio Domenianni, Patrycja Kielb
wiley +1 more source
Testing the limits: serial crystallography using unpatterned fixed targets
IUCrJSheet-on-sheet (SOS) fixed-target chips are arguably the most versatile, cheapest and simplest sample-delivery method for ambient-temperature data acquisition using serial crystallography approaches at synchrotrons and X-ray free-electron lasers (XFELs).
Alexander Gorel +12 more
doaj +1 more source
Electronic structure and correlations of vitamin B12 studied within the Haldane-Anderson impurity model [PDF]
, 2015 We study the electronic structure and correlations of vitamin B12 (cyanocobalamine) by using the framework of the multi-orbital single-impurity Haldane-Anderson model of a transition-metal impurity in a semiconductor host. The parameters of the effective
Bulut, Nejat +2 more
core +2 more sources
Metal Organic Framework‐Modified Carbon Fiber Microelectrodes for Enhanced Neurochemical Detection
ChemElectroChem, Volume 13, Issue 8, 15 April 2026.In this work, we modified carbon fiber microelectrodes (CFMEs) with the iron‐based metal organic framework MIL‐88B(Fe) and examined their performance using fast scan cyclic voltammetry (FSCV). The modification enhanced the dopamine signal at low concentrations and enabled consistent nanomolar detection, while maintaining clear peak separation in ...
Teflah Alshammari +4 more
wiley +1 more source
Bioavailability of Metal Ions and Evolutionary Adaptation
Life, 2012 The evolution of life on earth has been a long process that began nearly 3,5 x 109 years ago. In their initial moments, evolution was mainly influenced by anaerobic environments; with the rise of O2 and the corresponding change in bioavailability of ...
Rolando P. Hong Enriquez, Trang N. Do
doaj +1 more source
Modification of Aminoacyl tRNA Synthetase in Order to Incorporate an Unnatural Amino Acid [PDF]
, 2018 Proteins allow daily processes in the cell to occur. A protein consists of amino acids. There are twenty natural amino acids coded for in the DNA of organisms. The natural amino acids can be modified to form unnatural amino acids (UAAs). UAAs have useful
Burkhart, Grace
core +1 more source
Quantifying the Origins of Life on a Planetary Scale [PDF]
, 2015 A simple, heuristic formula with parallels to the Drake Equation is introduced to help focus discussion on open questions for the origins of life in a planetary context. This approach indicates a number of areas where quantitative progress can be made on
Cronin, Leroy, Scharf, Caleb
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Proteinvermittelte Kupfer‐Redoxregulation: Rolle von Disulfidbrücken und allosterischer Modulation
Angewandte Chemie, Volume 138, Issue 15, 6 April 2026.Copper binding triggers structural changes that expose a reactive disulphide bridge, enabling intrinsic Cu(II) reduction in folded proteins. SAXS, XAS, and QM/MM simulations reveal how globular proteins such as HSA and SOD1 employ disulphide‐mediated dynamics to modulate site accessibility and control copper redox chemistry.
Rebecca Sternke‐Hoffmann +9 more
wiley +1 more source
Microbial metal resistance and metabolism across dynamic landscapes: high-throughput environmental microbiology. [PDF]
, 2017 Multidimensional gradients of inorganic compounds influence microbial activity in diverse pristine and anthropogenically perturbed environments. Here, we suggest that high-throughput cultivation and genetics can be systematically applied to generate ...
Carlson, Hans +2 more
core +2 more sources