ISSN: 0022-1198
CODEN: JFSCA
Published Online: 1 April 1981
Page Count: 7

The Evidential Value of Peptidase A as a Semen Typing System
Parkin, BH
Principal scientific officer, head of Body Fluid Grouping, The Metropolitan Police Forensic Science Laboratory,

(Received 13 June 1980; accepted 17 October 1980)

Abstract

Human erythrocyte peptidase A (Pep A) displays a genetic polymorphism in blacks. Its occurrence in human semen was examined for its possible use as a semen typing system. Studies by starch gel electrophoresis, in which the Pep A was located by an improved method, were carried out on semen, semen stains, and vaginal swabs taken at known times after intercourse. In addition, a large number of vaginal swabs, negative for semen, were taken from females throughout their menstrual cycles and examined for Pep A activity. The results indicated that Pep A typing could be carried out on semen and semen stains. However, it was possible to determine the Pep A type on vaginal swabs only when they had been taken within about 3 h after intercourse.

Keywords:
pathology and biology, peptidase A, genetic typing

Paper ID: JFS11375J
DOI: 10.1520/JFS11375J
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