IL10 and melanoma: T2MzP B cells, which contain a subpopulation with the potential to become IL-10-producing cells, are mostly located in the spleen; however, T2MzP Bregs (CD23highCD21highIL-10+) were detected in the LNs of EAE mice (Supplementary Fig. 3a) and were previously reported in the draining LNs of melanoma tumors40.