Phosphoinositide and growth factor pathways

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A GDP analog that can't be converted to GTP was added to a cell. The GDP analog otherwise behaves the same as authentic GDP. When g-proteins bind to the GDP analog, they are inactive, just like when they bind authentic GDP. This cell has authentic GDP and plenty of GTP as well. What impact would this GDP analog have on the phosphoinositide (IP3) and growth factor pathways if it were bound to the g-proteins? Pick the best available answer.

The g-proteins in both pathways would likely be readily activated when the appropriate receptors are bound by their respective ligands because the GDP analog behaves like authentic GDP (other than it cannot be used to make GTP).

The g-proteins in both pathways would NOT be readily activated when the appropriate receptors are bound by their respective ligands since GTP can't be made from the analog.

Reference no: EM132063575

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