Abstract: Fab or Fc fragment of human IgG which is obtainable by enzymatic digestion of the human IgG is reduced by a reducing agent to sever an interchain of disulfide bonds therein and then blocked the SH radicals formed with alkyl group which may contain other groups. The resulting alkylated Fab and Fc fragments display therapeutic and prophylactic action for gastrointestinal ulcers by the oral or parenteral administration.

Abstract: Fab or Fc fragment of human IgG which is obtainable by enzymatic digestion of the human IgG is reduced by a reducing agent to sever an interchain of disulfide bonds therein and then blocked the SH radicals formed with alkyl group which may contain other group. The resulting alkylated Fab and Fc fragments display therapeutic and prophylactic action for gastrointestinal ulcers by the oral or parenteral administration.

Abstract: The invention provides a method of producing a water-soluble complex comprising a water-insoluble drug and a phospholipid, comprising the steps of (1) dissolving a water-insoluble drug and a phospholipid in an organic solvent, (2) removing the solvent to leave behind a drug-containing phospholipid film, (3) suspending the resulting film in an aqueous solution, (4) ultrasonicating the film, (5) centrifuging the resulting suspension, and (6) recovering the lowermost layer of the resulting sediment to yield the water-soluble complex. The above complex can be administered parenterally as well as by the oral and other routes, and is so rich in the drug component that a remarkably increased drug activity can be realized.

Abstract: A reagent for determination of human blood coagulation factor XIII for reversed passive hemagglutination reaction which comprises sensitized erythrocytes prepared by sensitizing animal erythrocytes with specific anti-human factor XIII antibody, and a kit using the reagent are disclosed.

Abstract: A process for heat treatment to inactive hepatitis virus in human blood coagulation factor XIII compositions, which is characterized in that the heat treatment at 50.degree. to 80.degree. C. of an aqueous solution containing the human blood coagulation factor XIII is carried out for 3 to 15 hours in the presence of 10% (W/V) or more of at least one principal stabilizer selected from the group consisting of neutral amino acids, monosaccharides and sugar alcohols and 10% (W/V) or more of at least one auxiliary stabilizer selected from the group consisting of salts of organic carboxylic acids having 3 to 10 carbon atoms.