Patent ID: 7901900

Claim:
A sandwich immunoassay kit which detects human low-molecular weight CD14 without detecting human high-molecular weight CD14, comprising; (a) an antibody that binds to a peptide consisting of the amino acid sequence of SEQ ID NO:2, wherein said antibody binds to human low molecular weight CD14, but does not bind to human high molecular weight CD14; and (b) an antibody that binds to a peptide consisting of the amino acid sequence from the position of 17th to the position of 26th of SEQ ID NO:5; wherein said human low-molecular weight CD14 has the characteristic features as follows; (1) no binding to F1025-3-1 (Accession No. FERM BP-7296) antibody, (2) showing a peak of elution in a molecular weight range of 25 to 45 kDa on a gel filtration chromatography, and (3) being obtainable from human blood.