Answer
See explanation
Work Step by Step
To define this protein as a symport, you need to specify:
- Directionality: Both solutes (A and B) must be transported in the same direction across the membrane.
- Gradient coupling: Movement of solute B down its electrochemical gradient must drive the uphill transport of solute A.
- Binding cooperativity: The protein must bind both solutes simultaneously before undergoing a conformational change.
So, the additional property is:
The conformational switch occurs only when both solutes are bound, and they are transported together in the same direction, with solute B’s favorable gradient driving solute A’s unfavorable movement.
