title: An exploratory study on the characterization of A1 and A2 bloodstains using a fluorescence immunoassay.
abstract: A fluorescence immunoassay method is used in the differentiation of A1 and A2 bloodstains. Anti-A antiserum is first absorbed onto the stain. The IgM content in the eluate is then quantified by commerical Immuno-Fluor kits. The binding difference of A1 and A2 cells is retained in stains. This difference and the quantitative evaluation method provide a potential basis for blood typing or subtyping application.
mesh_terms: D000017:ABO Blood-Group System; D001788:Blood Grouping and Crossmatching; D001801:Blood Stains; D005453:Fluorescence; D006801:Humans; D007118:Immunoassay / Q000379:methods*; D007075:Immunoglobulin M / Q000032:analysis
chemical_list: D000017:ABO Blood-Group System; D007075:Immunoglobulin M