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  • Title: Validation and population studies of the loci LDLR, GYPA, HBGG, D7S8, and Gc (PM loci), and HLA-DQ alpha using a multiplex amplification and typing procedure.
    Author: Budowle B, Lindsey JA, DeCou JA, Koons BW, Giusti AM, Comey CT.
    Journal: J Forensic Sci; 1995 Jan; 40(1):45-54. PubMed ID: 7876801.
    Abstract:
    Studies were performed to evaluate the forensic applicability of multiplex amplification of the loci low density lipoprotein receptor, glycophorin A, hemoglobin G gammaglobin, D7S8, and group-specific component (PM loci) and simultaneous typing of these loci using a reverse dot blot approach where allele specific oligonucleotide probes are immobilized on a nylon membrane strip. These results were obtained by using the AmpliType PM PCR Amplification and Typing Kit. The experiments included: mixed body fluid studies; chemical contaminant effects on the DNA in body fluid samples; the effect of typing DNA from body fluid samples deposited on various substrates; the effect of microorganism contamination on typing DNA derived from blood and semen; the effect of sunlight and storage conditions on DNA typing; determination of the sensitivity of detection of the PM test kit; determination of cross-reactivity of DNA from species other than human; typing DNA derived from various tissues from an individual; and an evaluation of the hybridization temperature of the assay. The data demonstrate that DNA exposed to a variety of environmental insults yields reliable PM typing results. Allele and genotype frequencies for six loci (PM loci and HLA-DQ alpha) were determined in African Americans. Caucasians, southeastern Hispanics, and southwestern Hispanics. All loci meet Hardy-Weinberg expectations and there is little evidence for association of alleles between the loci. The frequency data can be used in forensic analyses and paternity tests to estimate the frequency of a multiple locus DNA profile in various general United States populations.
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