this idea is based on observations that ( i ) na+ can be extruded from the cell by primary pumps ( na-motive nadh-quinone reductase , decarboxylase or atpase ) , and ( ii ) the downhill na+ flux into the cell can be coupled with the performance of all the three types of membrane-linked work i.e . chemical ( atp synthesis ) , osmotic ( accumulation of solutes ) and mechanical ( motility ) .
C0007634
the
C0007608
motility