Reactivity
Human
(tested or 100% immunogen sequence identity)
Specificity
The antigen is a 86kDa membrane protein, the epitope has not been further characterized. Antigen distribution: Isolated cells: Absent on freshly isolated monocytes and other blood cells; present on 40 - 50% of human monocytes after 6-7 days in culture, also positive on some melanoma and carcinoma cell lines. Tissue sections: Kupffer cells, histiocytes (skin), macrophages of the thymus, in the germinal centres of lymph nodes and spleen, in mamma carcinoma, melanoma, osteocarcinoma and gastric cancer; eczema, sarcoidosis, BCG granuloma; synovial lining cells, tuberculoid leprosy: no expression in lepromatous leprosy. Specificity: Human: mature macrophages and monocytes. Other: subpopulation of macrophages in Rhesus monkey; reactive with pig alveolar macrophages and Kupffer cells.