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COMMUNICATIOKS TO THE EDITOR 2909 acid3 and the oxidized protein was partially hydrolyzed (12 N HC1, 105', 3 hours). The hydroly-(1) C 0 Overberger, R J Ehrig and D 'Tanner, Tms J O U K~ 11 76,

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The paper describes the Toxicology Data Bank, a new system under development that will provide on-line access to chemical, physical, toxicologic, pharmacologic, use, and manufacturing data on 4000-5000 selected chemicals including drugs.

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