The 7.1 monoclonal antibody specifically recognizes Neural/Glial Antigen 2 (NG2) which is also known as Melanoma chondroitin sulfate proteoglycan (MCSP) and High molecular weight-melanoma associated antigen (HMW-MAA). This ~251 kDa transmembrane proteoglycan is encoded by CSPG4 (Chondroitin sulfate proteoglycan 4). Chondroitin Sulfate (NG2) is expressed by glial cells but not detected on normal marrow hematopoietic and peripheral blood cells. It is highly expressed by cells in some cancers including melanomas, leukemias, sarcomas and carcinomas. Chondroitin Sulfate (NG2) plays important roles in cellular proliferation, migration, and in oncogenic pathways involved in malignant transformation and metastases.