Abstract: An object of the present invention is to provide a latex particle for a measurement reagent with which highly sensitive measurement can be performed even in measuring a measurement sample containing a test substance in a dilute concentration. The preset invention relates to a latex particle for a measurement reagent including a copolymer obtained by copolymerizing a monomer mixture containing the following polymerizable monomers (a) to (c): (a) a polymerizable monomer having a phenyl group; (b) a polymerizable monomer having a phenyl group and a sulfonate; and (c) a polymerizable monomer having a naphthyl group, in an aqueous medium containing 7.5 to 25% by weight of C1-4 alcohol without using a surfactant.

Abstract: The present invention has an object to provide an insoluble carrier for an antiphospholipid antibody detection reagent having a high reactivity. The present invention also has an object to provide an antiphospholipid antibody detection reagent, and a method of detecting an antiphospholipid antibody. The present invention directs to an insoluble carrier for an antiphospholipid antibody detection reagent, having a zeta potential of lower than ?45 mV in the case that the insoluble carrier is suspended in a 20 mmol/L aqueous sodium phosphate solution with a pH of 7.4 so that the resulting suspension has a solids concentration of 0.1%.

Abstract: It is intended to provide a novel instrument for inducing a cytokine and a method of inducing a cytokine by which a cytokine can be effectively induced compared to the existing cytokine induction therapy. Namely, an instrument for inducing a cytokine which contains a hemolytic streptococcus and/or a hemolytic streptococcus-origin component and a water-insoluble carrier; and a method of inducing a cytokine by using this instrument for inducing a cytokine.