Amphivena Therapeutics Inc., of South San Francisco, closed on a $62 million series C that will allow the company to continue its study of selective myeloid-derived suppressor cell (MDSC) removal in hematologic and solid cancers and to advance its lead candidate, AMV-564, a bivalent, bispecific T-cell engager in a phase I trial for treating patients with relapsed/refractory acute myeloid leukemia and myelodysplastic syndromes.