| abstract |
In this water-containing fluid composition, which includes a processed lysozyme and/or salt thereof, the fluorescence intensity defined below is 5,000 or more, and the processed lysozyme and/or salt thereof is dissolved into the water-containing fluid composition while being in contact with a polar organic solvent, wherein the content of the polar organic solvent in the water-containing fluid composition is 55-90 mass%, inclusive. Fluorescence intensity: Fluorescence intensity obtained by measuring, under the conditions of an excitation wavelength of 390 nm (excitation bandwidth of 10 nm) and a fluorescence wavelength of 470 nm (fluorescence bandwidth of 10 nm), a solution obtained by reacting, for 30 minutes at room temperature, a solution obtained by adding 25 µL of an 8 mM 1,8-anilinonaphthalene sulfonate methanol solution to 5 mL of a dilute solution obtained by diluting the water-containing fluid composition with a phosphate buffer solution (pH 7.0) such that the concentration of the processed lysozyme and/or salt thereof is 0.05 mass% in terms of solid content and the phosphate concentration is 0.2M |