Silkworm Bombyx mori L.: Nature of Diapause Factor
Abstract
The diapause factor which is responsible for the induction of embryonic diapause in the silkworm (Bombyx mori L.) was isolated from the heads of female moths. It was extracted with 80 percent ethanol or 80 percent methanol and was heat-stable and not dialyzable. Since the active material was precipitated with ammonium sulfate and lost when incubated with proteolytic enzymes, it is highly probable that the diapause factor is a protein or a complex molecule containing peptide bonds. Molecular sieve techniques revealed two species of the diapause factor. The molecular weight of the smaller species lies between 5,000 and 10,000.
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Science
Volume 174 | Issue 4011
19 November 1971
19 November 1971
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© 1971 by the American Association for the Advancement of Science.
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Published in print: 19 November 1971
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