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From SNPedia
23andMe dataI4001527
23andMe searchI4001527
iGeno Mag Summary
(D;D) 2 Rh- blood
(D;I) 2 Rh+ blood
(I;I) 2 Rh+ blood

used by 23andMe to predict rhesus (Rh) blood factor

i4001527 DI/II Rh+ DD Rh-

See rs590787 on some 23andMe chips, however, it appears to have a high "no call" (i.e. failure) rate.