S83-102 Murine Monoclonal Antibody Against Normal and Malignant Human T Cells. (Leu-9). Murine Monoclonal Anitbodies Against Normal Malignant Human T-Cells. (Leu-9) Lab designation: SBCV9.1, This hybridoma produces a monoclonal antibody IgG2b against normal and malignant human T cells. It appears to be an equivalent of anti-Leu-9. Edgar Engleman F. Carl Grumet Steven Foung