cells were shown to transport pi by a 4,4'-dinitro stilbene-2,2'-disulfonate ( dnds ) -sensitive pathway ( 75 % ) , a newly discovered sodium-phosphate ( na/pi ) cotransport pathway ( 20 % ) , and a pathway linearly dependent on an extracellular phosphate concentration of up to 2.0 mm ( 5 % ) .
C0074757
sodium-phosphate
C0031603
phosphate