CAPRIN1 and cancer: CAPRIN-1 is a protein with extremely high interspecies homology, with at least 95% homology (of the amino acid sequence) between humans and mice, and as shown in the above results (Supplementary Fig. S8G), the anti-human CAPRIN-1 antibody (TRK-950) binds to the cell membrane surface of mouse cancer cells (4T1), and therefore it also has binding affinity with mouse CAPRIN-1.