Occurrence of Free D-Serine in the Earthworm

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LOMBRICINE was first isolated from the earthworm by Thoai and Robin1. Analysis of the crystalline material isolated in this laboratory2 showed that the serine component was of the D-configuration3. Serine ethanolamine phosphodiester, which has been shown to be a precursor of lombricine in the earthworm4, has been isolated in the crystalline form and shown to contain D-serine5.

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ROSENBERG, H., ENNOR, A. Occurrence of Free D-Serine in the Earthworm. Nature 187, 617–618 (1960) doi:10.1038/187617a0

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