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Alberts B, Bray D, Lewis J, et al. Molecular Biology of the Cell. 3rd edition. New York: Garland Science; 1994.

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Cover of Molecular Biology of the Cell

Molecular Biology of the Cell. 3rd edition.

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Figure 8-23. Chromosome puffs.

Figure 8-23Chromosome puffs

A temporal series of photographs illustrating how puffs arise and recede in the polytene chromosomes of Drosophila melanogaster during larval development. A region of the left arm of chromosome 3 is shown. It exhibits five very large puffs in salivary gland cells, each active for only a short developmental period. The series of changes shown occur over a period of 22 hours, appearing in a reproducible pattern as the organism develops. (Courtesy of Michael Ashburner.)

From: The Global Structure of Chromosomes

Copyright © 1994, Bruce Alberts, Dennis Bray, Julian Lewis, Martin Raff, Keith Roberts, and James D Watson.

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