Changes in Titer of Ecdysone in Bombyx mori during Metamorphosis

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Science  09 Feb 1962:
Vol. 135, Issue 3502, pp. 432
DOI: 10.1126/science.135.3502.432


The amount of ecdysone extracted from Bombyx mori rose precipitously immediately before, and fell immediately after, transition from the larval to the pupal stage, and thereafter a secondary rise in titer was observed. These observations correlate very well with physiologic sequences of metamorphosis, critical period, and oxygen uptake.