| Hemoglobin Cgeorgetown
Two abnormal Hb's, both with the substitution of a valyl residue for a glutamyl residue at the sixth position of the ß chain as in Hb S, and in addition, each has a second substitution of an asparaginyl residue for an aspartyl residue at position 73 of the ß chain; both types cause sickling of erythrocytes similar to Hb S. | |