An Inheritable B-like Character in Persons of Blood Group A

In a previous paper the author reported investigations of a blood sample (Co) whose blood cells contained, in addition to a normal A antigen, a weak, atypical B-like antigen. The present paper deals with two blood samples, El and Do, which probably possessed the same weak, atypical B-like character. A study of El’s family showed that this blood group character, provisionally designated as A^b, may be inheritable, as it was found in two children and one grandchild of El’s.

The serologic studies of the 5 A^b samples are reported, and on the basis of the family material the possible origin of the A^b character is discussed.