Table 3.

Na/K concentration ratios in single normal RBC, before and after valinomycin-induced dehydration in low-K media, measured by x-ray microanalysis

Sample	[Na]/[K]
Donor 1
Whole blood	0.02  ±  0.03
Val-sensitive	1.88  ±  0.47*
val-res	19.8   ±  4.8*†
Donor 2
Val-sensitive	3.00  ±  0.42*
val-res	53     ± 10*†

Results are mean ± SEM for 50 RBCs. *, P < 0.001 compared with whole blood sample;  

^†, P < 0.001 compared with valinomycin-sensitive sample from same donor.