DNA-Profiling on carpeting — Methods of purification, restriction and detection
In practice, bloodstains on carpeting are not very often submitted for investigation (approx. 5 % of all stained materials). However, carpeting is frequently very soiled or has been treated chemically (cleaned). In contrast to bloodstaines on smooth surfaces or cotton, DNA-extraction and restriction from bloodstains on soiled and highly absorbent materials is often difficult (Holtz and Olek, 1987; Kantner et al, 1988; Prinz and Berghaus, 1990; Scheithauer and Weisser, 1991a). Problems of identification of DNA from bloodstained materials previously treated with purification media have been demonstrated by Scheithauer (199lb).
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