definiens: means the hybridoma cell line BC3 described in Anasetti, C. et . al ., “ Induction of specific nonresponsiveness inunprimed human T cells by anti - CD3 antibody and alloantigen ”, J Exp . Med ., 172, pp . 1691 - 1700 ( 1990 ) and Anasetti, C. et . al ., Treatment of acute graft - versus - host disease with a nonmitogenic anti - CD3 monoclonal antibody, Transplantation, 54, pp . 844 - 851 ( 1992 ), and all progeny, clones, derivatives andmodifications thereof . Such derivatives and modifications shall not include antibodies which are not derived from or developed using the LICENSEDCELL LINE and/or LICENSED MONOCLONAL ANTIBODY ( collectively, ) and which have been entirely made with the use ofinformation or materials available in the public domain