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- W2037423647 abstract "The stability of oxyhemoglobin S during mechanical shaking was enhanced by the addition of human serum albumin. The stabilizing effect was maximum when the concentration of serum albumin approached that of oxyhemoglobin, suggesting a molecular level interaction between them. The effects of serum albumin on oxyhemoglobin A were essentially similar to those on oxyhemoglobin S. Deoxy- and methemoglobins were also stabilized by serum albumin. The addition of human serum albumin to a solution containing sickle cell oxyhemoglobin slowly formed a compound which had an absorbance peak at 620 nm. After purification by Sephadex G-200 column chromatography, this compound was identified as methemalbumin. Comparison of the rates of formation of methemalbumin from hemoglobin with various ligand states and human serum albumin showed that the rate of formation from hemichrome was much faster than from met-, oxy- and deoxyhemoglobin. About 60% of the heme was transferred from hemichrome to albumin when the mixture was kept standing at room temperature for 5 min. in contrast to only 5% from methemoglobin. This result suggests that hemichrome, rather than methemoglobin, is the intermediate in the formation of methemalbumin from oxyhemoglobin and human serum albumin. This hypothesis is supported by the finding that the rate of formation of methemalbumin was faster at alkaline pH values than at acid pH values. Serum albumin from various animal sources showed different stabilizing effects. The formation of methemalbumin from these animal albumins was far less than that from human albumin." @default.
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- W2037423647 date "1976-04-01" @default.
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- W2037423647 title "Interaction of serum albumin with normal and sickle hemoglobins" @default.
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- W2037423647 doi "https://doi.org/10.1016/0005-2795(76)90196-3" @default.
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