Hemoglobin S-Antilles
A form of hemoglobin caused by two mutations in its beta-chains, the classic beta S mutation (beta 6 Glu>Val) and beta 23 Val>Ile. Hemoglobin S-Antilles has the same electrophoretic mobility as Hemoglobin S but a distinct isoelectric focus and produces sickling in the carriers of the Hb A/S Antilles trait.