Abstract

Two nonhistone chromosomal proteins accumulate in the nucleus of Drosophila hydei salivary glands coincident with specific puff formation. A protein with a molecular weight of 40,000 appears in the nucleus with the induction of both the ecdysone puffs and puff II-48C. This protein appears to be associated with transcription in general or the phenomenon of puff formation. A protein with a molecular weight of 46,000 accumulates in salivary glands with the induction of II-48C but not with the induction of ecdysone puffs.

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