Variant haemoglobin found in a rare thalassaemia: there is a normal α chain but a composite δ–β chain as a result of an unequal crossing-over event. The composite chain is functional but synthesized at reduced rate. Anti-Lepore haemoglobins are mutants with the opposite composite chain—the N-terminus of β-globin and the C-terminus of δ-globin. Several variants of Lepore and anti-Lepore haemoglobin are known.
Subjects: Medicine and Health.