RT Journal Article SR Electronic T1 The phenotype Ae1B: a probable result of chimerism. JF Journal of Medical Genetics JO J Med Genet FD BMJ Publishing Group Ltd SP 398 OP 399 DO 10.1136/jmg.15.5.398 VO 15 IS 5 A1 Longster, G H A1 Robinson, E A A1 North, D I YR 1978 UL http://jmg.bmj.com/content/15/5/398.abstract AB An apparently normal healthy adult with the blood group phenotype Ae1B is described. The unusual ABO group is apparently the result of chimerism, the proportion of the minor population of cells being so small as to be only detectable by absorption and elution techniques.