PROBLEM TO BE SOLVED: To provide an aqueous suspension which contains a protein, is excellent in stability at the time of transport and storage, and in handling properties at the time of using.SOLUTION: The invention provides a protein aqueous suspension in which a protein and polyacrylic acid having a surface charge in a buffer form a complex and suspend, wherein the protein can be concentrated by removing at least some of water or buffer from a complex-containing aqueous suspension, and wherein the protein has shaking stress resistance in the complex.SELECTED DRAWING: NoneCOPYRIGHT: (C)2016,JPO&INPIT【課題】タンパク質を含み輸送時や保存時の安定性に優れ、用時の取り扱い性に優れる水性懸濁剤を提供する。【解決手段】緩衝液中で表面電荷を有するタンパク質とポリアクリル酸とが複合体を形成して懸濁する水性懸濁液で、複合体含有水性懸濁液から少なくとも一部の水または緩衝液を除去することによりタンパク質の濃縮が可能であり、複合体中で、タンパク質が振とうストレス耐性を有するタンパク質水性懸濁剤。【選択図】なし
