Table 3.

Quantification of glycophorin A-positive and PS-positive RBC-derived microparticles isolated from 42 day old RBC units using flow cytometric analyses.^*

	PS+	PS−	Total
Glycophorin A+	9357±4593†	3370±6237	12727±4219
Glycophorin A−	328±6245	9003±11822	9331±10038
Total	9685±4231	12373±10043	22058±9108

^*Microparticle isolates (n=8) were analyzed by flow cytometry as described in Fig 3.

^†The data are presented as the concentration of microparticles per mL of original RBC unit (mean±SD).