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Articles
DNA Contents of Chromosome Ph1 and Chromosome 21 in Human Chronic Granulocytic Leukemia
1 Institute for Cancer Research, Fox Chase, Philadelphia 11, Pennsylvania
The Philadelphia chromosome, characteristic of chronic granulocytic leukemia, contained 61±1 percent as much DNA as a number 21 (or 22) chromosome from which it is believed to be derived. The remaining 39 percent represents 0.5 percent of a diploid chromosome complement, approximately 2 x 107 nucleotide pairs; the method used was not sensitive enough to detect whether it had been translocated to other chromosomes.
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Science. ISSN 0036-8075 (print), 1095-9203 (online)