Caribou Biosciences Inc. has received FDA clearance of its IND application for CB-012, an allogeneic anti-C-type lectin-like molecule-1 (anti-CLL-1) chimeric antigen receptor (CAR) T-cell therapy. CLL-1 is highly expressed on acute myeloid leukemia (AML) cells and leukemic stem cells, but it is not expressed on hematopoietic stem cells.