Methylene Blue, 2,4-Dinitrophenol, and Oxygen Uptake of Intact and Homogenized Embryos.

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Abstract
Methylene blue, (MB) and 2,4-dinitrophenol (DNP) produce augmentation of O2 uptake of intact grasshopper embryos. MB produces augmentation of O2 uptake of homogenates made from embryos. DNP does not produce significant augmentation of O2 uptake of homogenates. MB produces augmentation of O2 uptake of intact nuclei and not of mitochondria or cytoplasmic constituents. DNP does not affect O2 uptake of isolated nuclei or mitochondria or other cytoplasmic constituents.
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