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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

Confirmation of D-aspartic acid in the novel dipeptide beta-aspartylglycine isolated from tissue extract of Aplysia kurodai.

A novel o-phthalaldehyde-reactive compound was found in the h.p.l.c. chromatogram of Aplysia kurodai extract. This compound was isolated by ion-exchange chromatography and preparative high-voltage paper electrophoresis. It was shown by optical-rotatory-dispersion spectrum and optical-resolution h.p.l.c. analysis that this compound consisted of equimolar amounts of D-aspartic acid and glycine. This compound resisted cleavage in the Edman reaction. This peptide was inferred to be beta-D-aspartylglycine, and this was confirmed by synthesis. beta-D-Aspartylglycine was detected in all tissues of Aplysia kurodai, with especially high concentrations in body wall (skin and muscle) and gill.[1]


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