first , phosphate uptake was shown to be strongly affected by the nature of na+ co-anions , the highest rates of uptake being observed with 100 mm-nascn ( 1.010 +/- 0.086 pmol/5 s per micrograms of protein ) and the lowest with 50 mm-na2so4 ( 0.331 +/- 0.046 pmol/5 s per micrograms of protein ) .
C0031603
phosphate
C0003075
anions