| 摘要 |
It is an object of the present invention to provide a method for maintaining the reactivity of microparticles having a reactive substance bound thereto in a dispersion liquid of the microparticles over a long period of time by stabilizing the microparticles in the dispersion liquid. The invention provides a method for stabilizing microparticles having a reactive substance bound thereto, which includes the step of allowing a sulfur-containing amino acid or a derivative thereof to coexist in a dispersion liquid of the microparticles. As for the sulfur-containing amino acid, cysteine, cystine, and methionine are preferable. The method of the invention is particularly useful when a precipitation preventing substance, such as a polyanion, dextran, or the like, is allowed to coexist in the dispersion liquid. |
