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<dl><dd>"CAS no. 73-22-3."</dd>
<dd>Includes bibliographical references (p. 35-37)</dd></dl><br>Subjects: Tryptophan; Amino acids; Carcinogenicity testing; Neoplasms, Experimental</div>
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<dl><dd>National Cancer Institute (U.S.). Division of Cancer Cause and Prevention</dd>
<dd>Southern Research Institute (Birmingham, Ala.)</dd>
<dd>Carcinogenesis Testing Program (U.S.)</dd></dl></div>
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