Results 261 to 270 of about 207,281 (307)
Some of the next articles are maybe not open access.
Heme-heme interaction in cytochrome oxidase
Biochimica et Biophysica Acta (BBA) - Bioenergetics, 1972Abstract The cytochromes a and a 3 of intact pigeon heart mitochondria are shown to contribute equally to the α band of cytochrome oxidase in the absence of added ligands. The oxidation-reduction midpoint potentials of the cytochromes a and a 3 at pH 7·2 are −220 mV and +380 mV, respectively.
D F, Wilson +2 more
openaire +2 more sources
The role of the heme propionates in heme biochemistry
Journal of Inorganic Biochemistry, 2006There are numerous studies, relying on both experimental and theoretical observations, illustrating the active role of the heme propionates in regulating electron delivery to the iron center as well as biochemical properties of the heme. Evidences for this come from a wide variety of heme containing systems: cytochromes, heme peroxidases, globins, etc.
Victor, Guallar, Brett, Olsen
openaire +2 more sources
Heme Catabolism and Heme Oxygenase in Neurodegenerative Disease
Antioxidants & Redox Signaling, 2004Heme oxygenase, the rate-limiting step in heme catabolism, appears to play an important role in a number of neurodegenerative disorders, such as Alzheimer disease. Interestingly, the spatial distribution of heme oxygenase-1 expression in diseased brain is essentially identical to that of the pathological expression of tau, suggesting a key role for ...
Takeda, Atsushi +7 more
openaire +3 more sources
Is the host heme incorporated in microbial heme‐proteins?
IUBMB Life, 2008[No abstract available]
Federica Tiburzi +2 more
openaire +3 more sources
Heme in the treatment of heme deficiency states
Scandinavian Journal of Clinical and Laboratory Investigation, 1990The mechanism of regulation of heme biosynthesis is of great interest for both biological and medical reasons. The hepatic and erythropoietic porphyrias are shown to be hereditary or acquired disorders characterized by defects in specific enzymes of the heme biosynthetic pathway.
openaire +2 more sources
Die Naturwissenschaften, 1970
Some of the general concepts which have emerged in the elucidation of the biochemical reactions and transformations which occur in living organisms, summarized very briefly, are that the basic chemical reactions in the cell are rather simple, that the celt synthesizes its complex molecules from relatively simple and available substances and that there ...
openaire +2 more sources
Some of the general concepts which have emerged in the elucidation of the biochemical reactions and transformations which occur in living organisms, summarized very briefly, are that the basic chemical reactions in the cell are rather simple, that the celt synthesizes its complex molecules from relatively simple and available substances and that there ...
openaire +2 more sources
The Biosynthesis of Heme O and Heme A Is Not Regulated by Copper
Biochemistry, 2005Heme A is an obligatory cofactor in all eukaryotic and many prokaryotic cytochrome c oxidase (CcO) enzymes. Despite its obvious importance to CcO and the electron transport pathway, essentially nothing is known concerning the regulation of heme A. Because CcO is the only natural target for heme A and copper is also required for CcO activity, it was ...
M Scott, Morrison +2 more
openaire +2 more sources
Transfer of heme from heme-albumin to hemopexin
Biochimica et Biophysica Acta (BBA) - General Subjects, 1976Exchange of heme in vitro between two heme-binding serum proteins, albumin and hemopexin, was examined spectrophotometrically. Hemopexin, albumin and heme in molar ratios of 1 : 70 : 1 were incubated at 22 degrees C, pH 7.3. The heme was added as free heme, heme-hemopexin or methemalbumin. Due to the high affinity of hemopexin for heme, Kd near 10(-13)
W T, Morgan +3 more
openaire +2 more sources
Processing of Heme and Heme-Containing Proteins by Bacteria
DNA and Cell Biology, 2002An extensive amount of new knowledge on bacterial systems involved in heme processing has been accumulated in the last 10 years. We discuss common themes in heme transport across bacterial outer and inner membranes, emphasizing proteins and mechanisms involved.
Igor, Stojiljkovic +1 more
openaire +2 more sources
Hadashot Arkheologiyot - Excavations and Surveys in Israel, 2015
In March 2014, a salvage excavation was conducted in an open area immediately to the south of Highway 1, between the Hemed and Har'el interchangess, prior to expansion of the road (Permit No. A-7125; map ref. 212753-73/634143-54, 212985-3000/634089-116; (Fig. 1). The excavation,
openaire +1 more source
In March 2014, a salvage excavation was conducted in an open area immediately to the south of Highway 1, between the Hemed and Har'el interchangess, prior to expansion of the road (Permit No. A-7125; map ref. 212753-73/634143-54, 212985-3000/634089-116; (Fig. 1). The excavation,
openaire +1 more source