evidence for carrier-mediated transport of monosaccharides in the ehrlich ascites tumor cells was provided through kinetic analysis of data obtained by : ( a ) studying sugar uptake by dilute cell suspensions with an optical densimetric apparatus , ( b ) studying sugar uptake by thicker cell suspensions by means of direct chemical analytical methods using packed cell plugs , ( c ) observing the effects of a competitive inhibitor upon sugar uptake with the chemical analytical method , and ( d ) measurement of tracer uptake of a high affinity sugar in thick cell suspensions in the absence of net movement .
C0026492
monosaccharides
C0007004
sugar