Dusting for prints: Antibody–magnetic-particle conjugates comprise protein-coated magnetic particles labeled with dye-tagged fragments (see picture). These particles bind to drugs and drug metabolites such as methadone and benzoylecgonine that are deposited within a latent fingerprint. The conjugates provide a means to image the fingerprint and enable the identification of an individual whilst simultaneously providing evidence of drug usage.
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Hazarika et al. (2008) studied this question.
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