Optical activity of crystalline glutamic acids

T. Asahi*, H. Utsumi, Y. Itagaki, I. Kagomiya, J. Kobayashi

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

16 Citations (Scopus)


As the first study on gyro-optical properties of amino acids, temperature dependences of the gyration tensor components of L- and D-glutamic acids were measured by using the HAUP (high-accuracy universal polarimeter). It was confirmed that the corresponding tensor components of the two enantiomers are the same in magnitude but opposite in sign. It is proposed that r =(ρC0S0)/ρ C0 be defined as the 'chirality index', where ρC0 and ρS0 designate rotatory powers per molecule in a crystal and in a dissolved state in liquid, respectively. It represents a measure of structural contribution of optical activity (OA) in a crystal. This value is 0.992 in glutamic acids.

Original languageEnglish
Pages (from-to)766-769
Number of pages4
JournalActa Crystallographica Section A: Foundations of Crystallography
Issue number5
Publication statusPublished - 1996 Sept 1

ASJC Scopus subject areas

  • Structural Biology


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