Single-cell RNA sequencing data from the TCGA-BLCA cohort and immunohistochemical stainings of bladder tumor tissues showed that the above-mentioned glycosyltransferase B4GALNT1 is enriched at both the RNA and protein levels in cancer-associated fibroblasts (CAFs), which simultaneously express high levels of heat shock proteins [32]. The gene discussed is B4GALNT1; the disease is cancer.