Short oligomeric chains of C-glycosyl beta-D-arabinofuranose configured tetrahydrofuran amino acids (where the C-2 and C-5 substituents of the tetrahydrofuran ring are cis to each other) exhibit a well-defined repeating turn secondary structure stabilised by (i, i - 2) inter-residue hydrogen bonds. This is in contrast to the epimeric alpha-D-arabinofuranose oligomer (where the C-2 and C-5 substituents of the tetrahydrofuran ring are trans to each other) in which there is no indication of any secondary structure in solution.

中文翻译：

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弯曲带状四氢呋喃氨基酸。

C-糖基β-D-呋喃糖构型的四氢呋喃氨基酸的短寡链（其中四氢呋喃环的C-2和C-5取代基彼此是顺式）表现出定义良好的重复匝二级结构，通过（i ，i-2）残基间氢键。这与差向异构体的α-D-阿拉伯呋喃糖低聚物（其中四氢呋喃环的C-2和C-5取代基相互颠倒）相反，在溶液中没有任何二级结构的迹象。