KRT13 and prostate cancer: KRT13 level in prostate cancer bone metastasis appear to be cell context-dependent, since despite the ability of 22Rv1 cell model [26] to exhibit bone- and brain metastasis potential, these cells expressed low levels of KRT13 compared to their KRT-transduced counterparts as assessed by IHC (Figure 3C), qRT-PCR (Figure 3D), and western blot (Figure 3E).