Thanks for the link, Anne. It doesn't mention which test kit they use (specific paternity-testing kits are available which may vary in terms in terms of which areas are examined, as opposed to those examined for forensic purposes ), but anyway they use a system based on 15 loci "loci (regiões)".
However, the components from the boot in Madeleine's profile were not the results from 15 loci (aka markers).
For a start, the UK only examine 10 loci (markers). They found - within that mixture of 37 alleles - 15 alleles (they search for 2 alleles at each of the loci (location/marker region). That result would have been useless to determine paternity (if the need had arisen) as such a test would require full and isolated profiles.
This is where the oft-repeated myth may have originated (from the same interview I quoted earlier).
GA: The reports from the English labs… the English reports arrive shortly before the questionings that were scheduled. And it contained certain conclusions, if they thought they were inconclusive they shouldn't have mentioned it, the question of the 15 alleles in a profile of 19 from the little girl, stating that they match Madeleine McCann, but they also say that it could have been a construction let's say from various donors, from other persons, a contamination could have produced Madeleine McCann's profile by coincidence. But there are no excuses for saying that it is not from Madeleine McCann because they held the profiles of the father, the mother, the siblings, therefore there are no doubts that at least within that family they only matched Madeleine McCann's.
DL: In Portugal, for example, we only need a match of 15 alleles out of 19 in order to determine someone's paternity, therefore… That is the first fact. The second fact is that at this moment, the institute for Forensic Medicine is already prepared, they already own the same equipment as the FSS in England to carry out this type of analysis. Why does the Public Ministry or the Polícia Judiciária not request, or don't they have any more samples to carry out…