Abstract
IN a recent preliminary communication, R. Tschesche1 has directed attention to the similarity between adenine hydrochloride and the crystals isolated by Barnes, O'Brien and Reader2. These crystals were specifically stated by them to have vitamin B4 activity (10γ per diem per rat), but no claim was made that they were actually vitamin B4. Tschesche does not state whether the specimen of crystals obtained by him was biologically active.
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References
Tschesche, Ber., 66, 581; 1933.
Barnes, O'Brien and Peters, Biochem. J., 26, 2055 ; 1932.
Kinnersley, O'Brien and Peters, Biochem. J., 27, 232 ; 1933
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HEARD, R., KINNERSLEY, H., O'BRIEN, J. et al. Vitamin B4 and Adenine. Nature 131, 617–618 (1933). https://doi.org/10.1038/131617b0
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DOI: https://doi.org/10.1038/131617b0
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