for the haemolysate from adults , lead was present in both hb a ( alpha 2 beta 2 ) and hb a2 ( alpha 2 delta 2 ) , whereas , in the haemolysate from new-born infants , the haemoglobin of fetal origin , hb f ( alpha 2 gamma 2 ) showed a much greater affinity for 203pb than the adult haemoglobin hb a ( alpha 2 beta 2 ) , obtained from maternal blood .
C0015936
hb f
C0019046
hb