Comparison of Metal Ions Recovered During DNA Analysis of Brass Ammunition and Effects of Copper and Zinc Ions on DNA Profiling

Analyzing DNA from brass surfaces poses unique challenges that may result from DNA damage and/or PCR inhibition. To examine the relationship between the metal ions present in brass ammunition and the success of Short Tandem Repeat (STR) profiling, six recovery methods were tested to determine the identity and quantity of metal ions co-recovered during DNA sampling. In addition, DNA and metal ion solutions were created at varying concentrations to determine the threshold at which deleterious effects occur.
Source: Forensic Science International: Genetics Supplement Series - Category: Forensic Medicine Authors: Source Type: research