Figure 5.

Depolarization increases the binding of lactadherin to apoptotic cells. Jurkat cells were prepared as described in the legend to Figure 2, and were then assayed with fluorescein-lactadherin in low-potassium A buffer (dashed lines) or depolarizing high-potassium B buffer (solid line). Assay in B buffer increased the mean fluorescence of the lactadherin-positive cell population by an average of 33 ± 2% compared to cells assayed in A buffer (mean ± SEM of three separate experiments). Horizontal lines indicate the gates used to define lactadherin-negative and lactadherin-positive cells.