Freeze-dried composition comprising a with sea radish peroxidase labeled fab '- fragment of a human beta - interferon antibody directed and trehalose; eia kit, the composition.

摘要

The present invention relates to the stabilization of enzyme-labeled antihuman interferon-β antibodies for use in an enzymatic immunoassay of human interferon-β and provides a freeze-dried composition containing an antihuman interferon-β antibody enzyme-labeled in the presence of trehalose as a nonreducing disaccharide. The freeze-dried composition according to the present invention whose reduction in enzymatic activity remains minimized even when stored for a long period of time is conveniently incorporated into an EIA kit. No ordinary non-volatile buffer solution such as a phosphate buffer solution is added to the original freeze-dried liquid of the present invention.