CGB3 and urothelial carcinoma: Further evaluation of expression of these genes in the TCGA urothelial carcinoma cohort revealed that while tumors tend to co-express CGB3, CGB5, and CGB8, CGB7-expressing tumors cluster independently, suggesting that CGB7 is less frequently co-expressed with CGB3, CGB5, and CGB8 (Figure 1E).