Freeze-dried composition containing enzyme-labeled anti-human interferon-.beta. antibody and enzyme immunoassay kit containing the composition

Abstract

The present invention relates to the stabilization of enzyme-labeled anti-human interferon-.beta. antibody for use in an enzyme immunoassay of human interferon-.beta. and provides a freeze-dried composition containing an anti-human interferon-.beta. antibody which has been freeze-dried 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 conventional non-volatile buffer solution such as a phosphate buffer solution is added to the original freeze-dried liquid of the present invention.

Dependencies are inferred from the claim text.