Interactions between sickle hemoglobin fibers.

Interactions between sickle hemoglobin fibers.
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镰状血红蛋白纤维之间的相互作用。

DOI:
10.1039/b207388a
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发表时间:
2003
影响因子:
3.4
通讯作者:
Turner,MatthewS
Turner,MatthewS
中科院分区:
化学2区
文献类型:
--
作者:
Jones,ChristopherW;Wang,JiangCheng;Ferrone,FrankA;Briehl,RobinW;Turner,MatthewS

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我们报告的观察“拉链”发生时,两个镰状血红蛋白纤维并排走到一起。一个瞬时的Y形物体被形成,它“拉链”闭合。我们已经能够展示如何通过研究有时在几个纤维之间形成的受抑结构来估计驱动这一过程的相互作用的强度。当我们的测量与通过弯曲涨落分析确定的力学常数相结合时,我们可以对这些相互作用的大小进行第一次估计,大约为7kBT μm−1。血红蛋白体积分数的几十%导致显着的耗竭力。我们估计的大小的消耗和货车范德华力对单纤维之间。我们研究这些是如何影响的螺旋性质的纤维和重新规范化的弯曲波动,计算,可以有更广泛的应用超出镰状血红蛋白纤维。我们对单纤维的理论分析虽然不是完全定量的,但与我们的测量结果是一致的。我们的结论是物理和流变学的血红蛋白凝胶,以及镰状细胞贫血本身的病理,可能会受到消耗的相互作用。
We report on observations of “zippering” that occurs when two sickle hemoglobin fibers come together side by side. A transient Y-shaped object is formed which “zips” closed. We have been able to show how the strength of the interactions that drive this may be estimated by studying the frustrated structures sometimes formed between several fibers. Our measurements, when combined with mechanical constants determined by an analysis of bending fluctuations, allow us to make the first estimate of the magnitude of these interactions, of the order of 7kBT μm−1. Hemoglobin volume fractions of tens of % lead to significant depletion forces. We estimate the magnitude of both the depletion and Van der Waals forces between pairs of single fibers. We study how these are effected by the helical nature of the fibers and renormalised by bending fluctuations, calculations that could have wider applications beyond sickle hemoglobin fibers. Our theoretical analysis of single fibers is in encouraging, although not fully quantitative, agreement with our measurements. We conclude that the physics and rheology of the hemoglobin gel, as well as the pathology of sickle cell anemia itself, may be influenced by depletion interactions.
关于镰状血红蛋白粗纤维的形成和结晶。
DOI: 10.1006/jsbi.1993.1008
发表时间: 1993
影响因子: 3
作者:
McDade,WA;Josephs,R
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影响因子: 5.6
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WISHNER, BC;WARD, KB;LOVE, WE
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DOI: --
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期刊: Nature
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DOI: 10.1006/jsbi.1993.1047
发表时间: 1993
影响因子: 3
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血红蛋白 S 纤维和凝胶的脆性和结构及其对凝胶动力学和流变学的影响
DOI: 10.1182/blood.v83.2.573.bloodjournal832573
发表时间: 1994
期刊: Blood
影响因子: 20.3
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