Just lip prints? No: there could be something else ANA CASTELLÓ, MERCEDES ALVAREZ and FERNANDO VERDÚ 1 Department of Legal Medicine, College of Medicine and Odontology, University of Valencia E.G., 46010 Valencia, Spain 1 Correspondence: Facultad de Medicina, U. D. Medicina Legal, Av., Blasco Ibañez, no. 15, 46010-Valencia, Spain. E-mail: Fernando.Verdu@uv.es <h2>DNA FROM LIP PRINTS?</h2> The polymerase chain reaction (PCR) technique brought about a major advance in DNA study, and criminology experts have obviously noticed the possibilities that implementation of this technique can contribute to investigating criminal cases. It is now possible to extract and study DNA from very small samples, even those that are invisible or latent. Although preferred samples from which to obtain DNA are those from biological fluids, it is possible to obtain DNA from fingerprints (1) . The possibility of studying profiles of DNA obtained from fingerprints allows us to consider that invisible or latent lip prints (that is, lip prints from protective lipstick or long-lasting lipstick that does not leave any visible mark) may provide cell remains from which DNA can be extracted. The following study demonstrates an attempt to obtain DNA from latent lip prints on porous surfaces (paper handkerchiefs). When dealing
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