Normal granular morphology in neutrophils from rac2^-/- mice. Neutrophils were pelleted from bone marrow and sectioned for EM analysis. Panels show typical cells from (A) WT and (B) rac2^-/- mice. Labels indicate primary granule (p), secondary granule (s), and Golgi apparatus (G). The bar indicates 1 μm. Original magnification, ×7000.