GINS4 and urinary bladder cancer: To assess the expression level of SLD5 in cancer cells relative to normal cells, we analyzed SLD5 mRNA expression in human bladder cancer cell lines (T24 and KMBC2), in human normal bladder cells (HNBC), and human umbilical vein endothelial cells (HUVECs) using quantitative (q) RT-PCR analysis.