Plant Biology

Use the Nernst equation to analyze the data presented below to
identify the nature of the transport system for cation “X+”. Use EX
and JCnet values to construct a current-voltage plot for this
situation.

Draw a schematic to describe the most likely transport system
for”X+.”

X+in the apoplasm = 0.5 mM

X+in the cytoplasm = 10 mM

Em =-135 mV

JX, net is an efflux

RT/F = 25.7 mV