Abstract: Disclosed is a method for producing an antibody, comprising culturing in a presence of a polyanionic compound an animal cell into which a gene encoding an antibody has been introduced whereby the animal cell produces the antibody, wherein the polyanionic compound is at least one selected from the group consisting of an anionic polysaccharide and an anionic polyamino acid, and the antibody is an antibody in which at least 3 amino acid residues of framework region 3 (FR3) are substituted each independently with an arginine residue or a lysine residue.

Abstract: Disclosed is a method for improving an affinity of an anti-cytokine antibody for an antigen, the method comprising: in an anti-cytokine antibody whose electrical characteristic of a complementarity determining region (CDR) is negatively charged, changing at least 3 amino acid residues of light chain framework region 3 to arginine residues or lysine residues, thereby improving an affinity for an antigen as compared with that of an antibody before the at least 3 amino acid residues are changed to arginine residues or lysine residues, wherein the at least 3 amino acid residues comprise residues at least 3 positions selected from the group consisting of positions 63, 65, 67, 70 and 72 of a light chain defined by Chothia method.

Abstract: Disclosed is a method for improving affinity of an antibody for an antigen, the method comprising: in the antibody, changing at least 3 amino acid residues of framework region 3 (FR3) as defined by Kabat method to arginine residues or lysine residues, thereby improving affinity of an antibody for an antigen as compared with that of an antibody before said at least 3 amino acid residues are changed to arginine residues or lysine residues, wherein said at least 3 amino acid residues comprise at least 3 selected from the group consisting of amino acid residues at positions 68, 70, 72, 74, 75, 77, 79, 81, 82A, 82B, 83, 84, 85 and 87 of a heavy chain as defined by the Kabat method.

Abstract: Disclosed is a monoclonal antibody reactive with a glycopeptide shown in (a), and not reactive with a glycopeptide shown in (b)

Abstract: Disclosed is a monoclonal antibody reacting with a glycopeptide, wherein the glycopeptide contains a core fucose moiety and at least 4 contiguous amino acid residues that are located on the C-terminal side of a glycosylated asparagine moiety, and both of the core fucose moiety in the glycopeptide and an amino acid residue that is located apart by at least three amino acid residues from the C-terminal of the glycosylated asparagine moiety in the glycopeptide are epitopes for the antibody.

Abstract: Disclosed is a monoclonal antibody reactive with a glycopeptide shown in (a), and not reactive with a glycopeptide shown in (b)

Abstract: Disclosed is a monoclonal antibody reacting with a glycopeptide, wherein the glycopeptide contains a core fucose moiety and at least 4 contiguous amino acid residues that are located on the C-terminal side of a glycosylated asparagine moiety, and both of the core fucose moiety in the glycopeptide and an amino acid residue that is located apart by at least three amino acid residues from the C-terminal of the glycosylated asparagine moiety in the glycopeptide are epitopes for the antibody.