Now latest news is that they now differtiate and report on which kind of DQ2 and some of the other genes are present. Now they ahve started to report DQ2,2 and DQ2,5 which now means that DQ2,2 is DQB1 0202 (in the beta chain) and DQB1 0201. DQ2,5 should have DQA1 0501 in the alpha chain if they test for it.
Rread the wikipedia charts, and note that there are two charts, the one says which ones are what and the other one gives percentage of how many are prevalent in the population of the top 25 types out of 75 known in caucasians.
So one can have some lesser prevalent combinations and testing only the beta chain will mistype some people.

Enterolab has started to give reports of wether one has DQ2,5 or 2,2 now. This has changed from before.

See this recent posting about the new kinds of report from enterolab.
http://www.glutenfreeforum.com/index...howtopic=46507

nora