Fig. 5.
Fig. 5. [Ca++]i-buffering causes a redistribution of F-actin and talin in PMNs. / PMNs were either loaded with quin2/AM (D-F) or not (A-C), then prepared for immunofluorescence as described. Samples were incubated in 5 μg/mL of a monoclonal antibody to talin, rinsed, and then stained with a TRITC-conjugated secondary antibody and FITC-conjugated phalloidin to visualize F-actin. In control cells (A-C), talin (C) is found colocalized with F-actin (B) predominately at the leading edge of motile cells. In contrast, when cells are [Ca++]i-buffered both talin (F) and F-actin (E) are found at the rear of cells as well as in the leading lamella if one exists. DIC images are shown (A, D). Bar = 10 μm.

[Ca++]i-buffering causes a redistribution of F-actin and talin in PMNs.

PMNs were either loaded with quin2/AM (D-F) or not (A-C), then prepared for immunofluorescence as described. Samples were incubated in 5 μg/mL of a monoclonal antibody to talin, rinsed, and then stained with a TRITC-conjugated secondary antibody and FITC-conjugated phalloidin to visualize F-actin. In control cells (A-C), talin (C) is found colocalized with F-actin (B) predominately at the leading edge of motile cells. In contrast, when cells are [Ca++]i-buffered both talin (F) and F-actin (E) are found at the rear of cells as well as in the leading lamella if one exists. DIC images are shown (A, D). Bar = 10 μm.

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