Disclosed is a modified colostrum protein having an amino acid sequence shown in SEQ ID NO.: 1, which is generated by replacing Ile at position 33, Glu at position 101 and Arg at position 175 present in the amino acid sequence of a wild type colostrum protein shown in SEQ ID NO.: 2 respectively with Ala, Cys and Cys.一種經修飾之初乳蛋白質,其胺基酸序列係如SEQ ID NO:1所示之胺基酸序列,為自如SEQ ID NO:2所示之野生型初乳蛋白質之胺基酸序列之第33位置的異白胺酸被丙胺酸取代,第101位置的麩胺酸被半胱胺酸取代,以及第175位置的精胺酸被半胱胺酸取代而產生。