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New Optimized DNA Extraction Protocol for Fingerprints Deposited on a Special Self‐Adhesive Security Seal and Other Latent Samples Used for Human Identification *
Author(s) -
Kopka Julieta,
Leder Monika,
Jaureguiberry Stella M.,
Brem Gottfried,
Boselli Gabriel O.
Publication year - 2011
Publication title -
journal of forensic sciences
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.715
H-Index - 96
eISSN - 1556-4029
pISSN - 0022-1198
DOI - 10.1111/j.1556-4029.2011.01853.x
Subject(s) - dna profiling , dna extraction , dna , microsatellite , chromatography , forensic genetics , nucleic acid , forensic identification , chemistry , computational biology , polymerase chain reaction , biology , genetics , biochemistry , gene , allele
Obtaining complete short tandem repeat (STR) profiles from fingerprints containing minimal amounts of DNA, using standard extraction techniques, can be difficult. The aim of this study was to evaluate a new kit, Fingerprint DNA Finder (FDF Kit), recently launched for the extraction of DNA and STR profiling from fingerprints placed on a special device known as Self‐Adhesive Security Seal Sticker ® and other latent fingerprints on forensic evidentiary material like metallic guns. The DNA extraction system is based on a reversal of the silica principle, and all the potential inhibiting substances are retained on the surface of a special adsorbent, while nucleic acids are not bound and remain in solution dramatically improving DNA recovery. DNA yield was quite variable among the samples tested, rendering in most of the cases (>90%) complete STR profiles, free of PCR inhibitors, and devoid of artifacts. Even samples with DNA amount below 100 pg could be successfully analyzed.