The effect of different EDTA concentrations on the DNA content of urine samples was examined and compared to untreated urine at various storage temperatures and times. The results indicate that adding EDTA increases the DNA stability for long time storage especially at low temperatures.
When aligning the human amelogenin X (AmelX)-gene with the human amelogenin Y (AmelY)-gene, 19 regions of absolute homology ranging in size from 22 to 80 bp, 5 deletions located on AmelX from 1 to 6 bp and 5 deletions 1-183 bp long located on AmelY can be observed. The regions of absolute homology are used to design primer sets which span deletions of the X- and/or Y-chromosome. The PCR products generated on the X- and Y-homologues differ in size. New regions of deletions and newly designed primers are described to facilitate the integration of the amelogenin sex test into multiplex PCR reactions.
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