Correlation of PS exposure with adherence to EC monolayers.

Ionophore-treated RBCs were mixed at varying proportions with untreated RBCs. The percentage of PS-exposing RBCs was measured by FACS analysis of annexin binding. Adherence to HUVECs was by a static assay. The coefficients of the linear regression are r = 0.94,P = .001, n = 4.