Haemoglobin D β Los Angeles (D Punjab, α2β2 121 Glu NH2) in a Thai Family

Abstract
A nonsickling abnormal hemoglobin moving between hemoglobins F and A2 in electrophoreses at pH 8.6 was found in a Thai family. Chemical analysis revealed that it was [alpha]2[beta]2 121Glu NH2 which is identical with hemoglobin D Punjab or D [beta] Los Angeles. Five persons were heterozygous for this hemoglobin; hemoglobin D constituted 36-40% and, except for 1 person with superimposed Fe deficiency, the hemato- logical findings including the levels of hemoglobins A2 and F were normal. It is the 1st detection of hemoglobin D in Thailand after several thousands of samples having been examined by starch gel electro-phoresis.