PROBLEM TO BE SOLVED: To provide a composition for stabilizing interleukin 6 (IL-6).SOLUTION: There is provided a composition comprising IL-6, an isoform or a fragment thereof a saturated or unsaturated and/or substituted or non-substituted compound of formula (I): 10C-18C alkyl trimethylammonium halogenide or its salt (the concentration of the compound in the composition is about 0.15 to about 0.4%) and a serum. There are further provided a lyophilizate of the composition and a kit comprising the composition or the lyophilizate and an instruction for use.COPYRIGHT: (C)2012,JPO&INPIT【課題】インターロイキン6(IL-6)の安定化のための組成物の提供。【解決手段】IL-6、そのアイソフォームまたは断片;飽和もしくは不飽和および/または置換もしくは非置換の、式C10~C18-アルキルトリメチルアンモニウムハロゲン化物(I)の化合物、またはその塩(ここで組成物中の化合物の濃度は約0.15~約0.4%である);および血清を含む組成物。またその凍結乾燥物。さらに、かかる組成物または凍結乾燥物および使用説明書を含むキット。【選択図】なし
