Flow cytometric analyses of optimized platelet samples after CD45-labeled Dynabead incubation. ( A ) Log forward and side scatter chart of platelet population (gated) of platelet sample with minimal contaminating cells. ( B ) Fluorescence chart of CD45 (FL2) and CD61 (FL1) antibody-labeled sample. Average CD61+: 97.99 ± 1.38% (n = 12). Average CD45+: 0.43 ± 0.33% (n = 12). ( C ) LeucoCOUNT chart for sample after density barrier centrifugation showing residual leukocytes (left gate) and LeucoCOUNT beads (right gate).