hemoglobin Portland

he·mo·glo·bin Port·land

a form of embryonic hemoglobin containing the ζ chains of hemoglobin Gower-1 and the γ chains of Hb F, thus having the formula ζ2γ2; essentially disappears by the third month of pregnancy. Compare: hemoglobin Gower-1, hemoglobin Gower-2.