KRT1 and urinary bladder cancer: Figure 3A–H demonstrates that KRT5, KRT14, and KRT16 protein expression were also reduced in the UROtsa As_I and As_II cells after KRT6 knockdown. Figure S3A,B shows that the transcript of KRT1 was reduced in both the cell lines after KRT6 knockdown. We also wanted to evaluate the correlation of expression between KRT6A and the other basal keratins in human bladder cancer using GEPIA2. The analysis demonstrated that human KRT6A expression is correlated (p < 0.05) to the expression of these other basal keratins in human bladder cancer cases (Figure S4A–D).