Which of the following is NOT true about the substrate-binding protein (SBP) of the ABC transport system?
A) It is found in the periplasm of Gram-negative cells.
B) It is found tethered in Gram-positive cells.
C) It binds to the periplasmic face of the channel and releases the solute.
D) It snags the appropriate solute.
E) It is required for both the uptake and efflux systems.

Question

Quizplus · Accepted Answer

The substrate-binding protein (SBP) of the ABC transport system is primarily involved in the uptake of solutes rather than their efflux. These proteins are specialized for capturing and delivering specific substrates to the transport system, facilitating their movement into the cell, rather than playing a role in expelling substances out of the cell.

Which of the Following Is NOT True About the Substrate-Binding