It refers to the variants of pertuzumab, especially the non obvious Swan variants including cy23 / cys88, but no mild variants of pertuzumab are shown in one or two fields; a related pertuzumab variant; a low molecular weight pertubab; And a certain high molecular weight of pertuzumab. It also refers to a variety of substances, synthesis, pharmacological composition, as well as manufacturing products including these variants, and the preparation and characterization methods of these variants and compositions.SE REFIERE A VARIANTES DE PERTUZUMAB, PARTICULARMENTE UNA VARIANTE DE CISTEINA NO APAREADA QUE COMPRENDEN LOS RESIDUOS Cys23/Cys88 SIN APAREAR EN UNO O AMBOS DOMINIOS VARIABLES LIVIANOS DE PERTUZUMAB; UNA VARIANTE AFUCOSILADA DE PERTUZUMAB; UNA ESPECIE DE BAJO PESO MOLECULAR (LMWS) DE PERTUZUMAB; Y UNA ESPECIE DE ALTO PESO MOLECULAR (HMWS) DE PERTUZUMAB. TAMBIEN SE REFIERE A VARIANTES AISLADAS DE PERTUZUMAB, COMPOSICIONES, COMPOSICIONES FARMACEUTICAS, Y ARTICULOS DE FABRICACION COMPRENDIENDO DICHAS VARIANTES, ASI COMO A METODOS DE PREPARACION Y CARACTERIZACION DE DICHAS VARIANTES Y COMPOSICIONES DE LAS MISMAS