کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7584423 | 1492026 | 2018 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Fe-transferrins or their homologues in ex-vivo mushrooms as identified by ESR spectroscopy and quantum chemical calculations: A full spin-Hamiltonian approach for the ferric sextet state with intermediate zero-field splitting parameters
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
شیمی
شیمی آنالیزی یا شیمی تجزیه
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Fe-transferrins/their homologues in ex-vivo mushrooms were identified by ESR spectroscopy at liquid helium temperature, 4â¯K. The ESR fine-structure signals from Grifola frondosa were analyzed by spectral simulation with a full spin-Hamiltonian approach, determining the spin Hamiltonian parameters of the ferric iron species bound in the biological environment: Sâ¯=â¯5/2, gâ¯=â¯(2.045, 2.01, 2.235), |D|â¯=â¯0.28â¯cmâ1, |E/D|â¯=â¯0.05. The zero-field splitting (ZFS) parameters, D- and E-values, are very close to the reported values, |D|â¯=â¯0.25â¯cmâ1 and |E/D|â¯=â¯0.06, for an Fe-transferrin with oxalate anion, and to |D|â¯=â¯0.25â¯cmâ1 and |E/D|â¯=â¯0.04 for one with malonate anion in human sera, suggesting that the Fe3+ species are from Fe-transferrins or their homologues. Quantum chemical calculations of the ZFS tensors for Fe-transferrins were carried out. Fe-transferrins/homologues have been identified for all the mushrooms under study, suggesting that such Fe3+ enzymes are widely distributed in mushrooms.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Food Chemistry - Volume 266, 15 November 2018, Pages 24-30
Journal: Food Chemistry - Volume 266, 15 November 2018, Pages 24-30
نویسندگان
Shigeaki Nakazawa, Tomomi Kanno, Kenji Sugisaki, Hiromi Kameya, Miki Matsui, Mitsuko Ukai, Kazunobu Sato, Takeji Takui,