Low pH myoglobin photoproducts
نویسندگان
چکیده
منابع مشابه
Modeling low-pH hemoproteins.
A tetracoordinate ferrous heme (iron-porphyrin) has been proposed as an intermediate at low pH (less than 3.0) for respiratory hemoproteins, peroxidases, and model heme complexes. This intermediate is believed to arise via protonation of the N(epsilon) atom of the proximal histidine and consequent cleavage of the Fe-N(epsilon) bond. To establish a spectral signature for the proposed low-pH tetr...
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The published electron microscope and X-ray structures of rhodopsin have made available a detailed picture of the inactive dark state of rhodopsin. Yet, the photointermediates of rhodopsin that ultimately lead to the activated receptor species still await a similar analysis. Such an analysis first requires the generation and characterization of the photoproducts that can be obtained in crystals...
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While enzymes are valuable tools in many fields of biotechnology, they are fragile and must be protected against denaturing conditions such as unfavorable solution pH. Within living organisms, chaperonins help enzymes fold into their native shape and protect them from damage. Inspired by this natural solution, mesoporous silica SBA-15 with different pore diameters is synthesized as a support ma...
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Two new products were isolated from uracil irradiated with ultraviolet light in frozen aqueous solution. As judged by mass, nuclear magnetic resonance, and ultraviolet and infrared spectra, one is a photopolymer, U(3) and the structure of the other is probably 6-4'-[ pyrimidin-2'-one]-uracil. Formations of these products between pyrimidine bases are apparently common photoreactions, and may be ...
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ژورنال
عنوان ژورنال: Biophysical Journal
سال: 1992
ISSN: 0006-3495
DOI: 10.1016/s0006-3495(92)81912-4