UBIAD1 and urinary bladder carcinoma: Observing that endogenous UBIAD1 is abundantly present in L02 cells, but not in HEK293 cells and bladder carcinoma T24 cells, and noting that the function of UBIAD1 in L02 cells is similar to that in the bladder carcinoma T24 [14], we used L02 cells as the material for isolating the Golgi and extracting large amount of UBIAD1 proteins (Figure 3).