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Vasseur C, Baudin-Creuza V. [Role of alpha-hemoglobin molecular chaperone in the hemoglobin formation and clinical expression of some hemoglobinopathies]. Transfus Clin Biol 2015; 22:49-57. [PMID: 25724329 DOI: 10.1016/j.tracli.2015.01.002] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/16/2015] [Accepted: 01/21/2015] [Indexed: 10/24/2022]
Abstract
Alpha-hemoglobin stabilizing protein (AHSP), described as a chaperone of alpha-hemoglobin (α-Hb), is synthesized at a high concentration in the erythroid precursors. AHSP specifically recognizes the G and H helices of α-Hb and forms a stable complex with free α-Hb until its association with the partner β-subunits. Unlike the free β-Hb which are soluble and form homologous tetramers, freshly synthesized α-Hb chains are highly unstable molecular species which precipitate and generate reactive oxygen species within the erythrocyte precursors of the bone marrow leading to apoptosis and ineffective erythropoiesis. AHSP protects the free α-Hb chains in maintaining it in the soluble state. In this review, we report data from the literature and our laboratory concerning the key role of AHSP in the biosynthesis of Hb and its possible involvement in some disorders of the red blood cell as well as the hemoglobinopathies and we discuss its use as a prognostic tool in thalassemia syndromes.
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Affiliation(s)
- C Vasseur
- Institut national de la santé et de la recherche médicale (INSERM) U955, équipe 2, université Paris Est Créteil, 5, avenue Gustave-Eiffel, 94000 Créteil, France; Laboratoire d'excellence des globules rouges (GR-EX), 75015 Paris, France
| | - V Baudin-Creuza
- Institut national de la santé et de la recherche médicale (INSERM) U955, équipe 2, université Paris Est Créteil, 5, avenue Gustave-Eiffel, 94000 Créteil, France; Laboratoire d'excellence des globules rouges (GR-EX), 75015 Paris, France.
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2
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Vasseur C, Pissard S, Domingues‐Hamdi E, Marden MC, Galactéros F, Baudin‐Creuza V. Evaluation of the free α-hemoglobin pool in red blood cells: a new test providing a scale of β-thalassemia severity. Am J Hematol 2011; 86:199-202. [PMID: 21264907 DOI: 10.1002/ajh.21918] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/11/2022]
Abstract
β-Thalassemias are characterized by an imbalance of globin chains with an excess of α-chains which precipitates in erythroid precursors and red blood cells (RBCs) leading to inefficient erythropoiesis. The severity of the disease correlates with the amount of unpaired α-chains.Our goal was to develop a simple test for evaluation of the free α-hemoglobin pool present in RBC lysates. Alpha-Hemoglobin Stabilizing Protein (AHSP), the chaperone of α-Hb, was used to trap excess a-Hb. A recombinant GST-AHSP fusion protein was bound to an affinity micro-column and then incubated with hemolysates of patients. After washing, the α-Hb was quantified by spectrophotometry in the elution fraction. This assay was applied to 54 patients: 28 without apparent Hb disorder, 20 β-thalassemic and 6 α-thalassemic. The average value of free α-Hb pool was 93 ± 21 ppm (ng of free α-Hb per mg of Hb subunits)in patients without Hb disorder, while it varies from 119 to 1,756 ppm, in β-thalassemic patients and correlated with genotype. In contrast,the value of the free α-Hb pool was decreased in α-thalassemic patients (65 ± 26 ppm). This assay may help to characterize β-thalassemia phenotypes and to follow the evolution of the globin chain imbalance(α/β+γ ratio) in response to treatment.
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Affiliation(s)
- Corinne Vasseur
- Institut National de la Santé et de la Recherche Médicale (INSERM) U779, Université Paris XI, Le Kremlin‐Bicêtre, France
| | - Serge Pissard
- Assistance Publique Hôpitaux de Paris (APHP), Laboratoire de biochimie et de génétique, Hôpital Henri Mondor, Université Paris Est (UPE), Créteil, France
- INSERM U955 équipe 11, IMRB, Créteil France
| | - Elisa Domingues‐Hamdi
- Institut National de la Santé et de la Recherche Médicale (INSERM) U779, Université Paris XI, Le Kremlin‐Bicêtre, France
| | - Michael C. Marden
- Institut National de la Santé et de la Recherche Médicale (INSERM) U779, Université Paris XI, Le Kremlin‐Bicêtre, France
| | - Frédéric Galactéros
- Assistance Publique Hôpitaux de Paris (APHP), Unité des Maladies Génétiques du Globule Rouge (UMGGR), Hôpital Henri Mondor, UPE, Créteil, France
| | - Véronique Baudin‐Creuza
- Institut National de la Santé et de la Recherche Médicale (INSERM) U779, Université Paris XI, Le Kremlin‐Bicêtre, France
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Mollan TL, Yu X, Weiss MJ, Olson JS. The role of alpha-hemoglobin stabilizing protein in redox chemistry, denaturation, and hemoglobin assembly. Antioxid Redox Signal 2010; 12:219-31. [PMID: 19659437 PMCID: PMC2821148 DOI: 10.1089/ars.2009.2780] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 10/20/2022]
Abstract
Hemoglobin biosynthesis in erythrocyte precursors involves several steps. The correct ratios and concentrations of normal alpha (alpha) and beta (beta) globin proteins must be expressed; apoproteins must be folded correctly; heme must be synthesized and incorporated into these globins rapidly; and the individual alpha and beta subunits must be rapidly and correctly assembled into heterotetramers. These events occur on a large scale in vivo, and dysregulation causes serious clinical disorders such as thalassemia syndromes. Recent work has implicated a conserved erythroid protein known as Alpha-Hemoglobin Stabilizing Protein (AHSP) as a participant in these events. Current evidence suggests that AHSP enhances alpha subunit stability and diminishes its participation in harmful redox chemistry. There is also evidence that AHSP facilitates one or more early-stage post-translational hemoglobin biosynthetic events. In this review, recent experimental results are discussed in light of several current models describing globin subunit folding, heme uptake, assembly, and denaturation during hemoglobin synthesis. Particular attention is devoted to molecular interactions with AHSP that relate to alpha chain oxidation and the ability of alpha chains to associate with partner beta chains.
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Affiliation(s)
- Todd L Mollan
- Department of Biochemistry and Cell Biology, Rice University, Houston, Texas 77251-1892, USA
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Rouyer-Fessard P, Scott MD, Leroy-Viard K, Garel MC, Bachir D, Galacteros F, Beuzard Y. Fate of alpha-hemoglobin chains and erythrocyte defects in beta-thalassemia. Ann N Y Acad Sci 1990; 612:106-17. [PMID: 2291540 DOI: 10.1111/j.1749-6632.1990.tb24296.x] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/31/2022]
Abstract
The fate of alpha-hemoglobin chains and the cause of membrane protein defects in thalassemic erythrocytes have been studied in: (1) human beta-thalassemia syndromes, (2) mouse beta-thalassemia, and (3) normal human erythrocytes loaded with purified alpha-hemoglobin chains. The similarity and differences observed in these three systems underline the importance of insoluble alpha chains and the direct relationship between the amount of these chains and the membrane protein defects. Indeed, in addition to the alpha/non-alpha ratio of globin chain synthesis, the proteolysis and instability of alpha chains are major factors in modulating the cellular defects.
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Rouyer-Fessard P, Garel MC, Domenget C, Guetarni D, Bachir D, Colonna P, Beuzard Y. A study of membrane protein defects and α hemoglobin chains of red blood cells in human β thalassemia. J Biol Chem 1989. [DOI: 10.1016/s0021-9258(19)47271-2] [Citation(s) in RCA: 32] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022] Open
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Braverman AS, Schwartzberg L, Berkowitz R. Soluble and stroma-bound globin chains in mild and severe beta thalassemia. Hemoglobin 1982; 6:347-67. [PMID: 7141874 DOI: 10.3109/03630268208996941] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/23/2023]
Abstract
In mild beta thalassemia hemoglobin levels are much higher than in severe beta thalassemia, yet black patients with the mild syndrome are as deficient in beta chain synthesis as severe thalassemia patients. The following studies were undertaken to determine if differences in the precipitation of excess alpha chain distinguishes these two groups of beta thalassemia homozygotes. The percentages of radioactive globin chain bound to erythroid cell stroma were determined in mild and severe thalassemia patients. Only the cells of splenectomized severe patients contained large amounts of stroma-bound globin radioactivity, the percentages in five such patients ranging from 6.7 to 13.9 (mean = 9.9). In four splenectomized patients with mild thalassemia the percentages ranged from 1.0 to 3.5 (mean = 1.9; p less than 0.005). This is the first observed difference in globin chain metabolism between these two groups of patients.
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Shaeffer JR, Schmidt GJ, Kingston RE, Bunn HF. Synthesis of hemoglobin Cranston, and elongated beta chain variant. J Mol Biol 1980; 140:377-89. [PMID: 7441747 DOI: 10.1016/0022-2836(80)90390-3] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/25/2023]
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9
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Vettore L, De Matteis MC, Bassetto MA, Pepe GM. Biosynthetic ratio of labelled globin chains in human reticulocytes, determined by electrophoresis on cellulose acetate. Hemoglobin 1978; 2:129-41. [PMID: 640851 DOI: 10.3109/03630267809074780] [Citation(s) in RCA: 14] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Abstract
The wide range of globin synthesis ratios reported in patients with sickle cell disease casts doubt on whether the presence of genes for alpha- or beta-thalassemia in combination with Hb S can be detected by globin synthesis studies. We have studied globin synthesis in 20 patients with Hb SS who had a mean betaA/alpha ratio of 1.05+/-0.04, similar to that of 28 control children. In nine of these patients the percentage of newly synthesized radioactive alpha-chains in dimer or monomer forms was 16.3%+/-1.3, also similar to the control subjects. The remainder of alpha-chain was in hemoglobin tetramer. In nine patients with Hb SC, the (non-alpha)/alpha ratio was 0.97+/-0.04, and the free alpha-chain pool radioactivity in four patients was 14.1%+/-4.2. In three patients with Hb CC, betac/alpha ratios were 0.99, 1.07, and 1.10. These results indicate that globin synthesis ratios and alpha-chain radioactivity in the free alpha-chain pool of peripheral blood of patients with Hb SS, Hb SC, and Hb CC have narrow ranges, close to those of nonthalassemic controls. The data provide a basis for detecting syndromes with Hb S or Hb C associated with alpha- or beta-thalassemia. This precise differentiation is important for clinical studies of severity in sickle cell disease and for genetic counseling.
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11
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Joishy SK, Griner PF, Rowley PT. Sickle beta-thalassemia: identical twins differing in severity implicate nongenetic factors influencing course. Am J Hematol 1976; 1:23-33. [PMID: 988745 DOI: 10.1002/ajh.2830010104] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
Abstract
25-yr old female identical twins of Italian-American origin concordant for sickle beta-thalassemia were studied to explain their clinical differences. One of them has been severely affected from childhood with one aplastic crisis, an earlier onset of vaso-occlusive crises, and recent cardiac decompensation; the other twin shows no cardiac decompensation. Similar are their degree of anemia, RBC indices, blood volumes, absence of splenic sequestration, depression of pO2, elevation of p50 and 2,3-DPG, hemoglobin composition, and peripheral blood globin-synthetic rates. Regarding differences, the more severely affected has a shorter 51Cr RBC life span, a greater menstrual blood loss, and is more overweight, whereas the less severely affected has functional asplenia by 99mTc scanning and a larger proportion of RBC with decreased cellular deformability. We conclude that in sickle beta-thalassemia: (1) genotype alone does not determine the clinical course; (2) significant differences in clinical course can occur with almost identical hemoglobin composition and globin synthetic rates; (3) cellular deformability changes do not correlate exactly with clinical course; and (4) functional asplenia and leanness may be advantageous.
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12
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Shaeffer JR, Longley MA, DeSimone J, Kleve LJ. Patterns of hemoglobin assembly in reticulocytes of sickle cell trait individuals. J Biol Chem 1975. [DOI: 10.1016/s0021-9258(19)40717-5] [Citation(s) in RCA: 15] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/30/2022] Open
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13
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Pongsamart S, Pootrakul S, Wasi P, Na-Nakorn S. Hemoglobin Constant Spring: hemoglobin synthesis in heterozygous and homozygous states. Biochem Biophys Res Commun 1975; 64:681-6. [PMID: 1147948 DOI: 10.1016/0006-291x(75)90374-5] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/25/2022]
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14
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Abstract
Hemoglobin chain synthesis during leukemic processes has been studied on patients having fetal hemoglobin. All cases showed the following abnormalities : (1) a relatively increased synthesis of the beta chain ; (2) an important increase of the free dimeric precursors pool, with, most of the time, a predominance of alpha chain. If the first point suggests an alpha-thalassemia feature, the presence of free alpha chains shows evidence for a more complex mechanism not only due to a decrease of messenger RNA. The hypothesis of a clonal disorder could neither be demonstrated nor ruled out. The observed abnormalities could be due to a defect in a alpha chain depending regulation mechanism.
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Pagnier J, Wajcman H, Labie A. Defect in hemoglobin synthesis possibly due to a disturbed association. FEBS Lett 1974; 45:252-5. [PMID: 4412714 DOI: 10.1016/0014-5793(74)80855-0] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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16
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Weatherall DJ, Clegg JB, Roberts AV, Knox-Macaulay HH. The clinical and chemical heterogeneity of the beta-thalassemias. Ann N Y Acad Sci 1974; 232:88-106. [PMID: 4370439 DOI: 10.1111/j.1749-6632.1974.tb20575.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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Tönz O, Glatthaar BE, Winterhalter KH, Ritter H. New mutation in a Swiss girl leading to clinical and biochemical beta-thalassemia minor. HUMANGENETIK 1973; 20:321-7. [PMID: 4768108 DOI: 10.1007/bf00273335] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/12/2023]
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19
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Abstract
A pool of free alpha-globin chains was found in the bone marrow samples from three controls, two patients with beta-thalassemia trait, three with sickle beta-thalassemia, three with hemoglobin (Hb) Lepore trait, one with alphabeta-thalassemia, four with homozygous beta-thalassemia, and one doubly heterozygous for Hb Lepore and beta-thalassemia. The average percentage of newly synthesized alpha-chains found in the free alpha-globin pool was 6.2% in the controls and 33.0% in the patients heterozygous for thalassemia or Hb Lepore. These controls and patients had balanced beta- and alpha-globin synthesis in the bone marrow. In the homozygous patients and in the one patient doubly heterozygous for thalassemia and Hb Lepore, there was a marked deficit of beta-chain synthesis in the bone marrow and also a large pool of newly synthesized free alpha-chains. The function of this pool of free alpha-chains is not known, but it may be involved in the regulation of globin chain synthesis in normal patients and in the compensatory synthesis of beta-chains that occurs in the bone marrow of patients heterozygous for thalassemia or for Hb Lepore.
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Clegg JB, Weatherall DJ. Haemoglobin synthesis during erythroid maturation in -thalassaemia. NATURE: NEW BIOLOGY 1972; 240:190-2. [PMID: 4508304 DOI: 10.1038/newbio240190a0] [Citation(s) in RCA: 53] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
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21
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Kan YW, Nathan DG, Lodish HF. Equal synthesis of - and -globin chains in erythroid precursors in heterozygous -thalassemia. J Clin Invest 1972; 51:1906-9. [PMID: 5032531 PMCID: PMC292339 DOI: 10.1172/jci106993] [Citation(s) in RCA: 31] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/13/2023] Open
Abstract
In patients with heterozygous beta-thalassemia, the beta/alpha synthetic ratio in marrow erythroid cells incubated in vitro is 1, whereas in reticulocytes the ratio is 0.5. These ratios reflect the equal synthesis of the two chains on the polyribosomes of the bone marrow and unequal synthesis on the polyribosomes of the peripheral blood reticulocytes. alpha- and beta-chain synthesis is also equal in marrow cells in vivo. Equal synthesis is probably due both to a decrease in alpha-chain synthesis and an increase in beta-chain synthesis in bone marrow erythroid cells and may contribute to the absence of overt hemolysis due to excess alpha-globin chain accumulation in heterozygous beta-thalassemia.
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Dreyfus JC, Labie D, Vibert M, Conconi F. An attempt at demonstrating the existence of a nonsense mutation in -thalassemia. EUROPEAN JOURNAL OF BIOCHEMISTRY 1972; 27:291-6. [PMID: 4115173 DOI: 10.1111/j.1432-1033.1972.tb01838.x] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 01/08/2023]
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23
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Rachmilewitz EA, Harari E. Slow rate of haemichrome formation from oxidized haemoglobin Bart's (4 ): a possible explanation for the unequal quantities of haemoglobins H ( 4 ) and Bart's in alpha-thalassaemia. Br J Haematol 1972; 22:357-64. [PMID: 4335297 DOI: 10.1111/j.1365-2141.1972.tb05682.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
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White JM, Brain MC, Ali MA. Globin synthesis in sideroblastic anaemia. I. Alpha and beta peptide chain synthesis. Br J Haematol 1971; 20:263-75. [PMID: 5552358 DOI: 10.1111/j.1365-2141.1971.tb07037.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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26
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Steadman JH, Yates A, Huehns ER. Idiopathic Heinz body anaemia: Hb-Bristol (beta67 (E11) Val to Asp). Br J Haematol 1970; 18:435-46. [PMID: 5420592 DOI: 10.1111/j.1365-2141.1970.tb01457.x] [Citation(s) in RCA: 64] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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27
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White JM, Brain MC. Defective synthesis of an unstable haemoglobin: haemoglobin Koln (beta 98 Val-Met). Br J Haematol 1970; 18:195-209. [PMID: 5439526 DOI: 10.1111/j.1365-2141.1970.tb01434.x] [Citation(s) in RCA: 24] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/15/2023]
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