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Bacterial Navigation

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Which protein is responsible for removing methyl groups on the MCP receptors?

CheR

CheB (correct)

SAM

CheA

What is the role of CheB methylesterase in the feedback loop?

To reset the receptor for excitation (correct)

To increase the negative charge on the receptor

To activate the CheA kinase activity

To remove attractant from the environment

What is the effect of CheB esterase-dependent removal of MCP methyl groups?

It neutralizes the negative charges on the signaling domains of an MCP dimer

It intensifies the electrostatic force, repelling the MCP struts from each other (correct)

It reduces the repulsive electrostatic effects, allowing the MCP struts to move closer to each other

It increases the CheA-PO4 level, leading to higher CheA kinase activity

Bacterial Navigation

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Questions and Answers

Which protein is responsible for removing methyl groups on the MCP receptors?

What is the role of CheB methylesterase in the feedback loop?

What is the effect of CheB esterase-dependent removal of MCP methyl groups?

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