A crystallographic titration of the dipeptide L-isoleucyl-L-isoleucine

Gorbitz CH

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A crystallographic titration of the dipeptide L-isoleucyl-L-isoleucine

机译：二肽L-异亮氨酰-L-异亮氨酸的晶体学滴定

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The dipeptide L-Ile-L-Ile has been crystallized in four different protonation states, including as a cation, a zwitterion and an anion, as well as a dimeric cation in which two peptide molecules, linked by a strong -COO...H...OOC- hydrogen bond, share an overall positive charge of +1. This unprecedented series of crystal structures exhibits differences in hydrogen-bonding capabilities, conformational properties and molecular packing arrangements. The crystallization Of L-IleL-Ile as an anion was achieved by slow evaporation from an NH3(1) solution to give the first ever ammonium salt of a peptide (or amino acid).

机译：二肽L-Ile-L-Ile已结晶成四个不同的质子化态，包括阳离子，两性离子和阴离子，以及二聚阳离子，其中两个肽分子通过强-COO连接。 H ... OOC-氢键的总正电荷为+1。这种前所未有的晶体结构系列在氢键能力，构象性质和分子堆积排列方面表现出差异。 L-IleL-Ile作为阴离子的结晶是通过从NH3（1）溶液中缓慢蒸发而获得的，从而获得了肽（或氨基酸）的首个铵盐。

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《Acta Crystallographica, Section B. Structural Science》 |2004年第5期|共9页
作者
Gorbitz CH;
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正文语种 eng
中图分类晶体学;
关键词
ALANYL-L-ALANINE; LEUCYL-L-ALANINE; CRYSTAL-STRUCTURES; L-PHENYLALANINE; PERCHLORATE MONOHYDRATE; HYDROPHOBIC DIPEPTIDES; HYDROGEN NITRATE; ACID; TRIHYDRATE; SEQUENCES;

机译：丙氨酰-L-丙氨酸;亮氨酸-L-丙氨酸;晶体结构;L-苯丙氨酸;高氯酸一铵;疏水性二肽;硝酸氢盐;酸;三水合物;序列;

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1. A crystallographic titration of the dipeptide L-isoleucyl-L-isoleucine [J] . Gorbitz CH Acta Crystallographica, Section B. Structural Science . 2004,第5期

机译：二肽L-异亮氨酰-L-异亮氨酸的晶体学滴定
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A crystallographic titration of the dipeptide L-isoleucyl-L-isoleucine

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