BCR and neoplasm: Additionally, analysis of more than 5,000 TCGA RNA-seq samples revealed that high levels of IgG3–1 switch are associated with prolonged survival in patients with high SHM rates, whereas IgG3–1 levels are not prognostic in low SHM samples, underscoring the role of SHM in generating BCR sequences with high binding affinity to the exposed tumor antigens (Hu et al., 2019).