The presence of HbS was reported in Turkey for the first time in the late fifties by Aksoy et al. This was followed by other reports by the same author revealing the presence of several other abnormal hemoglobins in Turkey. So far up to present 42 abnormal hemoglobins have been identified in the Turkish population. In addition to the studies conducted in Turkey, many European researchers report...

Unstable hemoglobins are structural variants of the hemoglobin molecule, mostly originated by single amino-acid replacement in some globin chains. These changes affect molecule stability, leading to loss of solubility, precipitation, and cellular lysis. Patients carrying these unstable hemoglobins may present mild to severe chronic hemolytic anemia. Hemoglobin Evans is an unstable variant origi...

Sickle cell disease is a hereditary, autosomal recessive pathology caused by the replacement of adenine thymin in position 6 beta globin gene, producing anomalous hemoglobin (hemoglobin S- HbS). It characterized chronic inflammatory state with hemolytic anemia and vaso-occlusive phenomena occurs when HbS gene homozygosis (SS) or heterozygosis, association other variant hemoglobins (SD, SC, SE) ...

Several screening methods for detecting sickling hemoglobins are presently used in the clinical laboratory (1-6). The present procedure depends on the insolubility of reduced hemoglobin S in a 2.24 mol/liter phosphate buffer. The commercially available “Sickledex” (Ortho Diagnostics, Raritan, N.J. 08869) is also thought to be based on this principle (6). Our method was compared with the standar...

The complete ammo acid sequence of 147 residues has been determined for the major monomeric component of the hemoglobin of the bloodworm, Glycera dibranchiata. The residues at 34 sites (23 %) appear to be identical with those in sperm whale myoglobin. Of the 7 “invariant” residues found in vertebrate hemoglobins only three are present in this molecule: the glycine and phenylalanine residues at ...

Polycythemia in carriers of hemoglobin J Cape Town or hemoglobin Chesapeake is thought to be produced by increased oxygen affinity of their blood. Both hemoglobins involve substitution of amino acid residue alpha FG-4. Measurements reported here, of the oxygen equilibrium of purified hemoglobin J Cape Town, permit direct comparison of the two hemoglobins. J Cape Town exhibits lower oxygen affin...

IFFERENCES IN THE HEMOGLOBINS of the adult and the newborn have been recognized since 1866 (36). Rapid advances in this field, however, began in 1949, when Pauling and Itano (25) discovered that the hemoglobin of sickle cell disease differs from adult hemoglobin. Since that time, 8 hemoglobins have been identified, hemoglobin C (18) in 1950, hemoglobin D (14) in 1951, hemoglobin E (7, 17) and h...

Almtract--1. Properties of hemoglobins in the blood of the salamanders Cryptobranchus alleganiensis, Necturus maculosus and Hynobius tsuensis were examined by starch gel electrophoresis and peptide mapping. 2. Multiple hemoglobin components were found in individual specimens of N. maculosus and H. tsuensis, but a single component was observed in C. alleganiemis. 3. Sedimentation coefficients of...