How can multiple MAP kinase pathways be segregated when they share a common component,like a downstream kinase?
A)formation of pathway-specific complexes assembled on molecular scaffolds
B)activation of different small G proteins
C)differential activation of activation lip tyrosines
D)phosphorylation of PTB-containing proteins

Question

Quizplus · Accepted Answer

Pathway-specific complexes assembled on molecular scaffolds can segregate multiple MAP kinase pathways even if they share a common downstream kinase because each complex would be specific to a particular upstream kinase, allowing for pathway specificity. This mechanism has been observed in the assembly of the ERK1/2/MAPK pathway. Options B, C, and D are unlikely to segregate MAP kinase pathways that share a downstream kinase because they do not provide a mechanism for specificity.

How Can Multiple MAP Kinase Pathways Be Segregated When They