コポリ（Ｌ‐メチオニン，Ｌ‐ホモシステイン）の合成とその分子形態

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タイトル別名
  • Syntheses and Conformations of Poly (<SUB>L</SUB>-methionine-<I>co</I>-<SUB>L</SUB>-homocysteine) s
  • コポリ L メチオニン L ホモシステイン ノ ゴウセイ ト ソノ ブンシ ケ

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Poly (L-methionine) was converted by reduction with sodium in liquid ammonia under various conditions into seven kinds of poly (L-methionine-co-L-homocysteine) s having the homocysteine contents of 11, 19, 26, 44, 72, 81, and 88% (mol%). The conversion into L-homocysteine units of up to 80% can be reproduced under relatively mild conditions. Although the solubilities of the copolymers in organic solvents decrease with an increase of homocysteine content, all the copolymers prepared are soluble in methanesulfonic acid and trifluoromethanesulfonic acid. The copolymers were found to have a random coil conformation in methanesulfonic acid and a random coil structure containing some ahelical conformation in dichloroacetic acid, by viscometric measurement and optical rotatory dispersion. On the other hand, their conformations in a solid state were determined to be a mixture of α-helix and β-form from the infrared absorption spectra.

収録刊行物

  • 高分子論文集

    高分子論文集 36 (9), 629-634, 1979

    公益社団法人 高分子学会

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