Fig. 2.
Direct immunofluorescence of binding of VT-FITC to PMNs.
Whole blood was incubated with CD13-PE (A), a specific marker for PMNs, and with VT-FITC (B) on ice for 20 minutes. PMNs were the cells that had bound VT-FITC. No other components of blood were positive for binding VT-FITC.