Origin of Phosphatides in Chick Embryo

Relative Specific Activity op Phosphatides Extracted from Embryo AND Residual Yolk (88) 

Time of incubation, days Phosphatides extracted Specific activity 

The specific activities of inorganic phosphorus, hexose monophosphate phosphorus, creatine phosphorus, phosphatide phosphorus, and residual phosphorus extracted from the embryo had the same value, showing that the inorganic phosphorus atom reaching the embryo has the same chance of entering a phosphatide or other molecule. 

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