D. Single cell morphology assay of MDA-MB-231 cells cultured in 3D-collagen and analysed for morphology 24 hours after transient knock-down using either a control sequence (NT, non-targeting) or a sequence targeting the RASSF1 locus. RASSF1 knock-down marks a reduction in rounded cells. Data information: All data are from n=3 independent experiments. Data are analyzed by Student T-test and represented as mean ± SEM.* p ≤ 0.05, ** p ≤ 0.01, *** p ≤ 0.001. 