Low including the pI protein or the carbohydrate, the unique binding constituent and the diagnostic test kit and the usage null which

摘要

PURPOSE: To realize highly sensitive diagnostic test by employing a specific binding composition containing a specific binding species and a water soluble protein having specific pI value or a carbonhydrate. CONSTITUTION: The invention is applied for detecting the presence of a target ligand in a biological specimen derived from a human or animal quickly. The ligand may be any chemical or biological substance where a corresponding receptor reacting specifically on the spot to form a composite is present. Typically, the ligand includes protein, peptide, mold, bacteria and their components although it is not restrictive. It is especially useful for detecting a carbohydrate extracted from a streptococcal antibody, e.g. streptococcal A, B, C or G group organism. Most preferably, streptococcal A antibody can be detected.