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<p>of the Avery discovery: "I saw before me (in 1944), in dark contours, the beginning of a grammar of biology", and in 1950 he published a paper with the conclusion that the amounts of <a href="page.php?w=adenine">adenine</a> and <a href="page.php?w=thymine">thymine</a> in DNA were roughly the same, as were the amounts of <a href="page.php?w=cytosine">cytosine</a> and <a href="page.php?w=guanine">guanine</a>. This later became known as the first of <a href="page.php?w=Chargaff%27s_rules">Chargaff's rules</a>. Instrumental in his DNA discoveries</p><p>
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