these data , and observations on the effect of pre-incubation of kidney slices in s ( 35 ) -free media before the addition of radiosulfate , have been interpreted as evidence that s ( 35 ) accumulation in vitro may be resolved into at least two processes , namely ( a ) entrance of the isotope-labelled anion into the cells , by diffusion and/or active transport , and ( b ) complexing of s ( 35 ) ( in ionic or other form ) with an intracellular component .
C0003075
anion
C0022023
ionic