Flow cytometric analysis of CD11b expression on rat bone marrow cells. Lewis rat bone marrow cells were stained with either APC Mouse IgA, κ Isotype Control (Cat. No. 562140, Left Panel) or an APC Mouse Anti-Rat CD11b antibody (Cat.No. 562102, Right Panel). Two-parameter flow cytometric dot blots showing side-scattered light signals versus CD11b (or Ig Isotype Control staining) were derived from gated events with the forward light-scatter characteristics of viable bone marrow cells. Flow cytometry was performed using a BD™ LSR II Flow Cytometer System.