Published Online: 1 July 1980
Page Count: 9
Criminalist, Contra Costa County Sheriff's Office, Criminalistics Laboratory, Martinez, Calif
Criminalist, Forensic Science Associates, Emeryville, Calif
(Received 1 October 1979; accepted 24 November 1979)
Contamination of semen by saliva can result in the alteration of seminal phosphoglucomutase (PGM1) isozyme patterns. The alteration is characterized by the gradual loss of the a and b isozyme bands with the concomitant generation of anodal bands; eventually, all PGM activity is lost. The conversion of PGM isozyme patterns has been shown to be due to a dialyzable heat-labile factor in saliva and a nondialyzable heat-labile factor in semen. The implications of this conversion for PGM typing in sexual assault evidence are discussed.
Paper ID: JFS11248J