Table 1.

Effect of Replacing Extracellular Ca2+With EGTA on Dense Cell Formation

Condition (n = 4) % Cells After 22 Hours of O-D Cycling
LD ND ID HD
0.5 mmol/L Ca2+ 6 ± 2  32 ± 24  38 ± 26  24 ± 8  
0.5 mmol/L EGTA  7 ± 3  33 ± 20  51 ± 13  9 ± 8  
    p < .043v Ca2+ 
Condition (n = 4) % Cells After 22 Hours of O-D Cycling
LD ND ID HD
0.5 mmol/L Ca2+ 6 ± 2  32 ± 24  38 ± 26  24 ± 8  
0.5 mmol/L EGTA  7 ± 3  33 ± 20  51 ± 13  9 ± 8  
    p < .043v Ca2+ 

SS-ND cells were O-D cycled for 22 hours at pH 6.8 in buffer containing physiologic levels of Cl, after which the cells were separated using continuous density gradients and quantitated, as in Fig 1. LD, <1.080 g/mL; ND, 1.080 to 1.090 g/mL; ID, 1.090 to 1.114 g/mL; HD, >1.114 g/mL.

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