Analysis of DDX11 siRNA-transfected melanoma cells. (A, panel a) Schematic presentation of human DDX11 transcript variant 1, and protein isoform 1. The red-colored symbol above exon 3 in transcript 1 marks the position of the DDX11 siRNA, and the green-colored bar symbol above exons 20–22, indicates the location of the DDX11 qPCR primers used in the qPCR analysis. (A, panel b) Immunofluorescence analysis of WM1158 MGP melanoma cells at 24 hr following transfection with 5 nM of Cy5-conjugated DDX11 siRNA (pseudocolored yellow). Nuclei (pseudocolored blue) were counterstained with fluorescent DAPI. (B) qPCR analysis of WM1158 MGP melanoma cells that had received only Lipofectamine 2000 (black-colored bar), or were transfected with 25 nM of control siRNAs (grey-colored bar) or DDX11 siRNA (red-colored bar) for 48 hr. (C) Phase-contrast images, captured at 10X magnification, depicting the morphology WM1158 MGP melanoma cells following transfection with 150 nM of control siRNAs for 96 hr (a) or with 1 nM (b), 25 nM (c) or 150 nM (d) of DDX11 siRNA for 24 hr. The red-colored arrow in the phase-contrast images, shown in panels c and d, points to the chain-like morphology of melanoma cells that did not separate.