In cotransport, a membrane protein couples the transport of two solutes.

Cotransport

active transport system or cotransport system.

the main feature of cotransport is that neither molecule can move alone; movement of both molecules is obligatory or coupled..

When the transported molecule and cotransported ion move in the same direction, the process is said to be symport.

when they move in opposite directions, the process is said antiport

Plants use an ekectrogenic pump, a proton pump and a con transport protein to load sucrose. The sucrose is produced by photosynthesis that turn into specialized cells in the veins of their leaves.