In addition, Fluorescence Activated Cell Sorting, FACS analysis with Raji lymphoma cells demonstrated positive staining with CD37 antibody but not with other K562 leukemia cells or multiple myeloma RPMI8226, colon cancer Lovo cells, breast cancer MCF-7, or MDA-231 cells (Figure 1E). Here, CD37 is linked to malignant colon neoplasm.