. . "LEFT_TO_RIGHT"^^ . . "HETERODIMER_ASSOCIATION_LEFT__Pen_2-_Presenilin_C_terminal_fragment-_Presenilin_N_terminal_fragment-_Nicastrin-_Aph_1-RIGHT__Complex__Nicastrin_Aph_1__Pen_2_Presenilin_N_terminal_fragment__Presenilin_C_terminal_fragment_-_r45"^^ . . . . . . . . . . . . . . "true"^^ . "HETERODIMER_ASSOCIATION_LEFT__Pen_2-_Presenilin_C_terminal_fragment-_Presenilin_N_terminal_fragment-_Nicastrin-_Aph_1-RIGHT__Complex__Nicastrin_Aph_1__Pen_2_Presenilin_N_terminal_fragment__Presenilin_C_terminal_fragment_-_r45"^^ .