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Soft X-ray natural circular dichroism of aspartic acid and tyrosine

アスパラギン酸とチロシンの軟X線自然円偏光二色性

泉 雄大*; 田邊 真依子*; 今津 亜季子*; 三本 晶*; 中川 和道*; 田中 真人*; 安居院 あかね; 室 隆桂之*

Izumi, Yudai*; Tanabe, Maiko*; Imazu, Akiko*; Mimoto, Aki*; Nakagawa, Kazumichi*; Tanaka, Masahito*; Agui, Akane; Muro, Takayuki*

酸素原子の付近で対掌性構造を調べるために、われわれは酸素K-端地域でアスパラギン酸(Asp)とチロシン(Tyr)の軟X線自然円偏光二色性(SXNCD)を測定した。SXNCD測定は、SPring-8のBL25SU beamlineで実行した。特に533eVのまわりで酸素COO$$^{-}$$1s$$pi$$$$^{*}$$遷移に着目した。ランダム配意試料を用い、E1E2メカニズムを排し、E1M1だけを検出した。

We measured soft X-ray natural circular dichroism (SXNCD) of aspartic acid (Asp) and tyrosine (Tyr) at oxygen K-edge region, in an attempt to obtain chiral structure at the vicinity of oxygen atoms. SXNCD measurement was carried out at the BL25SU beamline of the SPring-8, Japan. We focused on oxygen COO$$^{-}$$ 1s $$pi$$$$^{*}$$ transitions around 533 eV. Since we used sublimation films which are randomly oriented samples, we could reject E1E2 mechanism and pick up only E1M1 mechanism.

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