definiens: means each of the following : ( a ) this Agreement ; ( b ) the Stock Purchase Agreement between the Company and Parent ; ( c ) the Employment Offer Letter & Proprietary Information and Inventions Assignment Agreements with current and proposed employees of the Company ; ( d ) the Exclusive License and Service Agreement wi th Parent ; ( e ) the Collaboration Agreement ; ( f ) the Indemnification Agreement with each of the directors of the Company ; ( g ) ( IL21 - MDA [ * * * ] ) Sublicense Agreement with MD Anderson ; ( h ) ( Gamma Delta T cells - MDA [ * * * ] ) License Agreement with MD Anderson ; ( i ) ( Fratricide – MDA [ * * * ] ) Option Agreement with MD Anderson ; ( j ) ( Mispairing - MDA [ * * * ], MDA [ * * * ], and MDA [ * * * ] ) Option Agreement with MD Anderson ; ( k ) ( 2D3 Chimeric ab -gd - MDA [ * * * ], MDA [ * * * ], and MDA [ * * * ] ) Option Agreement with MD Anderson ; ( l ) ( FHCRC – MDA [ * * * ] ) Option Agreement with MD Anderson ; and ( m ) K562 Option Agreement