Haptoglobin Phenotyping from Older Bloodstains by Enzume Immunoassay and Haptoglobin Phenotypes Within a Nebraska Caucasian Population

• NCJ Number: 128920
• Journal: Journal of Forensic Sciences Volume: 36 Issue: 2 Dated: (March 1991) Pages: 571-575
• Author(s): R Roy; I C Roy
• Date Published: 1991
• Length: 5 pages
• Publication Format: Article
• Publication Type: Research (Applied/Empirical)
• Language: English
• Country: United States of America

Annotation

Enzyme immunoassay and Western blotting (electrophoretic) techniques were used to determine haptoglobin (HP) phenotypes from older bloodstains.

Abstract

Serum was collected from liquid blood and the HP phenotypes were determined. Bloodstains were prepared from these specimens and stored at various temperatures for several months. The stains were extracted and applied to gradient polyacrylamide gels. The Western blotting technique was used to achieve the transfer of HP bands from the gels to the nitrocellulose membranes. Enzyme immunoassay with goat anti-HP antiserum and rabbit anti-goat immunoglobulin peroxidase were used to identify the HP bands from the extracted samples. Enzyme immunoassay was found to be clearly more sensitive than o-dianisidine or o-toluidine in detecting HP bands from diluted serum samples. The haptoglobin frequency in a Caucasian population in Nebraska was calculated. The frequencies of Phenotypes 1, 2-1, and 2 were found to be 15.8, 48.4, and 35.8 percent respectively. 1 table, 2 figures, and 15 references (Author abstract)