ISSN: 0022-1198
CODEN: JFSCA
Page Count: 5

Haptoglobin Phenotyping from Older Bloodstains by Enzyme Immunoassay and Haptoglobin Phenotypes Within a Nebraska Caucasian Population
Roy, IC
Student, Stanford University Medical School, CA

Roy, R
Forensic serology supervisor, Nebraska State Patrol Crime Laboratory, NE

(Received 4 May 1990; accepted 5 June 1990)

Abstract

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

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-tolidine 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%, respectively.

Keywords:
pathology and biology, genetic typing, haptoglobin, enzyme immunoassay, Western blotting, phenotype frequency

Paper ID: JFS13060J
DOI: 10.1520/JFS13060J
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