Phagocytic activity in TM cells.

<p>(A) Fluorescence microcopy image of human TM cells phagocytically challenged with pHRodo-labeled E. coli (1×10 ⁶ particles/mL). Note the puncta red staining indicating the presence of engulfed E. coli particles. (B) Light microscopy image of human TM cells phagocytically challenged to pigment particles (1×10 ⁶ particles/mL). (C) Electron micrograph image of human TM cells phagocytically challenged to pigment particles. Note the presence of numerous engulfed pigment particles (p) contained in membrane-bound organelles.