Magnetic purification. A shows intact HL-60 cells after phagocytosis of bacteria. B shows the same material after nitrogen cavitation, and C shows what can be retrieved from such a sample by one magnetic purification step (mostly phagosomes and free bacteria); scale bar 10 μm.
Lönnbro et al. BMC Cell Biology 2008 9:35 doi:10.1186/1471-2121-9-35