Paramagnetic Resonance Absorption of cytochrome c in the frequency Range 20-50 MHz.

细胞色素 c 在 20-50 MHz 频率范围内的顺磁共振吸收。

• 批准号: 60460028
• 负责人: ONO Kazuo
• 金额: $ 4.8万
• 依托单位: SAITAMA UNIVERSITY
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (B)
• 财政年份: 1985
• 资助国家: 日本
• 起止时间: 1985 至 1986
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-60460028/
• 关键词: Paramagnetic resonance absorption; 長波長電子スピン共鳴吸收

It was reported by the authers that the electronic state of <Fe^(3+)> of the oxidized cytochrome <c_3> is a low spin state and the heme-heme spin interaction was observed to be more than about ten times than expected. The interaction consists of two components; the dipolar interaction, <W_(> alpha <:p)> and the exchange interaction, Wex. The results obtained by us suggested that Wex>> <W_(> alpha <:p)> . In ordef to investigate the interaction directly, the frequency dependence of the absorption shape in the paramagnetic resonance has been measured in the microwave frequency range between 20 and 50 MHz, where <mu> Hres may grow up into the interaction energy as the frequency is increased. We have tried to observe the resonance absorption at temperatures down to 1.4 K, but we have not clearly observe any absorption. Considering the sensitivity of our ESR apparatus, the absorption line width may be estimated as several tens Oersteds which may come from the dipolar interaction. Therefore, on the contrary of our expectation, we may conclude that Wex<< <W_(> alpha <:p)> .

据作者报道，氧化后的细胞色素&lt；C3&gt；的~lt；Fe^(3+)&gt；的电子态为低自旋态，并观察到血红素-血红素的自旋相互作用比预期的大十倍以上。相互作用由两部分组成：偶极相互作用&lt；W_(&gt；α&lt；：p)&gt；和交换作用Wex。结果表明，Wx&gt；&gt；&lt；W_(&gt；α&lt；：p)&gt；为了直接研究相互作用，在20~50 MHz的微波频率范围内，测量了顺磁共振吸收形状的频率依赖性，随着频率的增加，~lt；Mu；Hres可能成长为相互作用能。我们试图在1.4K以下观察到共振吸收，但我们没有清楚地观察到任何吸收。考虑到我们的ESR装置的灵敏度，估计吸收线宽可能是来自偶极相互作用的几十个Oersteds。因此，与我们的预期相反，我们可以得出结论：Wex；lt；&lt；W_(&gt；α&lt；：p)&gt；。

项目成果

Kazuo ONO: "Paramagnetic Resonance Absorption of cytochrome <c_3> in the Frequency Range 20 - 50 MHz." Journal Of the Physical Society of Japan.

Kazuo ONO：“细胞色素 <c_3> 在 20 - 50 MHz 频率范围内的顺磁共振吸收。”

Kazuo 【O!^】NO 他: Journal of the Physical Society of Japan.

Kazuo 【O!^】NO 等人：日本物理学会杂志。