Alexa fluor 568 and 647

S2 cells transiently expressing CD8-GFP were grown on concanavalin A–coated (0.5 mg/ml; EMD Millipore) glass coverslips at 25°C in Schneider’s insect medium (Gibco) + 10% FBS (Invitrogen) and fixed with 4% paraformaldehyde for 10 min and subsequently extracted with 0.1% Triton X-100 for 10 min. After short washes in PBS and blocking with 10% FBS, cells were incubated with mouse anti-lamin Dm0 (clone ADL67, 1:50; Developmental Studies Hybridoma Bank) and rat anti–α-tubulin (YOL1/34, 1:100; Serotec), followed by short washes in PBS and incubation with Alexa Fluor 568 and 647 (1:1,000; Invitrogen). DNA was counterstained with DAPI (1 µg/ml; Sigma-Aldrich) before coverslips were mounted in 90% glycerol + 10% Tris, pH 8.5, + 0.5% N-propylgallate on glass slides. Images were acquired on an AxioImager Z1 (100×, Plan Apochromatic oil DIC objective lens, 1.4 NA; all from Carl Zeiss) equipped with a charge-coupled device (CCD) camera (ORCA-R2; Hamamatsu Photonics) using the Zen software (Carl Zeiss) and blind deconvolved using Autoquant X (Media Cybernetics). Images were processed (contrast adjustments) in Adobe Photoshop CS4 (Adobe) and represent either maximum intensity projections of deconvolved z stacks (step size: 0.22 µm; DAPI; α-tubulin) or a single slice (CD8-GFP; lamin Dm0).