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ShiftX (Shifts from X-ray structures) is a freely available web server for rapidly calculating protein chemical shifts from protein X-ray (or NMR) coordinates. Protein chemical shift prediction (also known as protein chemical shift calculation) is particularly useful in verifying protein chemical shift assignments, adjusting mis-referenced chemical shifts, refining NMR protein structures (via ...
Ferric-chelate reductase (NADPH) (EC 1.16.1.9, ferric chelate reductase, iron chelate reductase, NADPH:Fe 3+-EDTA reductase, NADPH-dependent ferric reductase, yqjH (gene)) is an enzyme with systematic name Fe(II):NADP + oxidoreductase. [1] [2] [3] This enzyme catalyses the following chemical reaction
Unprotected experiments in the U.S. in 1896 with an early X-ray tube (Crookes tube), when the dangers of radiation were largely unknown.[1]The history of radiation protection begins at the turn of the 19th and 20th centuries with the realization that ionizing radiation from natural and artificial sources can have harmful effects on living organisms.
The X ray diffraction of potassic-magnesio-fluoro-arfevsonite gave values of the chart above. Calculated unit cell dimensions are a = 9.9591(4), b = 17.9529(7), ...
The enhancement of the brightness compared to the unfocused output from the bomb is /, where is the efficiency of conversion from bomb X-rays to laser X-rays, and is the dispersion angle. [ 117 ] If a typical ICBM is 1 metre (3 ft 3 in) in diameter, at a distance of 1,000 kilometers (620 mi) represents a solid angle of 10 −12 steradian (sr).
Gomberg's dimer is the organic compound with the formula Ph 2 C=C 6 H 5-CPh 3, where Ph = C 6 H 5.It is a yellow solid that is air-stable for hours at room temperature and soluble in organic solvents. [1]
The structure of Bfr has been determined by x-ray crystallography. [ 1 ] [ 2 ] Bfr forms a roughly spherical, hollow shell from 24 identical subunits, incorporating 12 haem groups. Structure of a monoclinic crystal form of cytochrome b1 (bacterioferritin) from E-coli Iron is stored as a hydrated ferric oxide mineral in its central cavity (about ...
A phylloquinone, sometimes called vitamin K 1, [16] is the next early electron acceptor in PSI. It oxidizes A 1 in order to receive the electron and in turn is re-oxidized by F x, from which the electron is passed to F b and F a. [16] [17] The reduction of F x appears to be the rate-limiting step. [15]