Hi Tim Thank you for the answer. I understand your example but I don't understand the later information especially in the page links. Is there a website with labelled diagrams that explain this is a basic way. Karen > However, the > results from Family Finder and 23andMe are in the plus (or forward) strand > orientation. See http://www.ks.uiuc.edu/Research/hemolysin/3versus5 and > http://www.imgt.org/IMGTindex/dnaStrand.html for background on the strand > orientation issue. > >