The specific activity (enzyme activity/protein concentration) of amylase was determined for the identification of saliva stains. The specific activity of amylase in saliva stains rapidly decreased during the first hour but, from 1 to 28 days, this decrease was much less when the stains were kept at
Identification of semen in stain by determination of the specific activity of l-tartrate-inhibitable acid phosphatase
β Scribed by Tamaki, Keiji ;Fujisawa, Kazue ;Okajima, Hiroshi ;Sato, Keizo ;Katsumata, Yoshinao
- Publisher
- Springer-Verlag
- Year
- 1989
- Tongue
- English
- Weight
- 460 KB
- Volume
- 102
- Category
- Article
- ISSN
- 1437-1596
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β¦ Synopsis
For identification of semen in stain the specific activity of Ltartrate-inhibitable acid phosphatase (ACP) was determined. With each stain extract, both enzyme activity and protein concentration were determined, and the specific activity (enzyme activity/protein concentration) was calculated. Seminal stains showed a value of 23.8 _+ 15.2 (mean _+ SD) IU/mg protein, while vaginal fluid stains showed a value of 0.088 _+ 0.049 IU/mg protein. Stains of other body fluids did not show any L-tartrate-inhibitable ACP activity. Furthermore, only eight of 30 plant juice stains showed any levels of L-tartrate-inhibitable ACP, although all plants tested showed ACP activity. As the present method enables us to analyze forensic samples quantitatively, it seems to be useful for forensic practice.
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