The CD15 antibody recognizes a 3-fucosyl-N-acetyllactosamine carbohydrate modification in glycolipids or glycoproteins. The CD15 antigen is expressed on neutrophils, eosinophils, and monoblastoid precursor cells of the myeloid lineage but not on basophils and lymphocytes. The antigen is also present on Hodgkin/Reed-Sternberg cells.