Electron micrograph of a frozen thin section of an immature neutrophil labeled for LAMP-2, using the MoAb H4B4. At lower magnification the cell can be identified as a promyelocyte (see b). The Golgi region of this cell can be seen at higher magnification in a. Most of the gold grains are present in vesicular structures (arrows). The vesicles (v) are concentrated near the Golgi complex (Gc) and the centriole (C). Note the absence of label on the plasma membrane (PM). Nucleus (Nu).