definiens: means any product for human and/or animaltherapeutic or prophylactic use, now or hereafter developed by [COMPANY], which isproduced ( or susceptible of being produced ) from or incorporates any antibodies(including Fragments thereof as hereinafter defined ) secreted from the J5D4 CellLine and/or the PCB5 Cell Line ( as hereinafter defined ) or any other cell linescapable of producing any such antibodies, or which product is chemically, organically, biologically or synthetically derived from or based upon any suchantibodies, in each case either alone or in combination with any othertherapeutic agent . For purposes of this Section 1.8, the term shallmean any part or parts of any said antibodies chemically, biologically ororganically obtained from said antibodies, or synthetically produced, and < PAGE > -3- which mimics the biological behavior of said antibodies . For purposes of thisSection 1.8, the term shall mean the cell line described as amurine hybridoma as identified by American Type Culture Collection No . HB 9083and mutants and genetically manipulated variants thereof ; and the term shall mean the cell line described as a murine hybridoma asidentified by American Type Culture Collection No . HB 8909 and mutants andgenetically manipulated variants thereof