Using confocal imaging, we confirmed that LGALS3BP co-localizes with the exosome markers CD-63 and CD-81 (Figure 1D and Figure S1A) and its mature form is enriched in exosomes/EVs isolated from SKNAS but not hNB neuroblastoma cells (Figure 1E and Figure S1B), providing an opportunity for specific targeting with 1959 antibody (Figure 1F). Here, LGALS3BP is linked to neuroblastoma.