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  • Title: Accumulation of D-aspartic acid with age in the human brain.
    Author: Man EH, Sandhouse ME, Burg J, Fisher GH.
    Journal: Science; 1983 Jun 24; 220(4604):1407-8. PubMed ID: 6857259.
    Abstract:
    An age-related accumulation of D-aspartic acid was detected in the white matter of ten normal brains from individuals aged 30 to 80 years. Gray matter showed no systematic increase in D-aspartic acid. The rate constant for D-aspartate formation in the brain is equal to the predicted value calculated for 37 degrees C. Accumulation of the uncommon D-aspartate isomer in myelinated white matter implies that there is little or no turnover of this tissue, and this may have a bearing on dysfunction of the aging brain or on other diseases of myelin.
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