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  • 1
    Electronic Resource
    Electronic Resource
    Oxford, UK : Blackwell Publishing Ltd
    Annals of the New York Academy of Sciences 165 (1969), S. 0 
    ISSN: 1749-6632
    Source: Blackwell Publishing Journal Backfiles 1879-2005
    Topics: Natural Sciences in General
    Type of Medium: Electronic Resource
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  • 2
    ISSN: 1476-4687
    Source: Nature Archives 1869 - 2009
    Topics: Biology , Chemistry and Pharmacology , Medicine , Natural Sciences in General , Physics
    Notes: [Auszug] Observations compatible with ?-thalassaemia trait are usually made in one parent only of a patient with Hb H disease. Several genetic mechanisms were examined8, the most important question being whether this disease is caused by one or two ?-thalassaemic genes. Our data indicate that two abnormal ...
    Type of Medium: Electronic Resource
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  • 3
    Electronic Resource
    Electronic Resource
    Springer
    Human genetics 〈Berlin〉 23 (1974), S. 199-204 
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Description / Table of Contents: Zusammenfassung Bei einem 28 Jahre alten, gesunden Manne von chinesischer Abstammung mit normalem hämatologischen Befund wurde ein abnormes Hämoglobin gefunden, das im Stärkegel langsamer wanderte als HoF. Die relative Menge der abnormen Komponente sowie von HbA2 und langsamen HbA2 wurde durch Cellulose-Acetat-Elektrophorese bestimmt; sie betrug 15,2,1,64 und 0,56%. Die Untersuchung der Hb-Ketten mit p-Chloromercuribenzoat bestätigte, daß es sich um eine α-Ketten-Variante handelt. Die abnorme Globinkette wurde durch Carboxylmethylcellulose-Chromatographie fraktioniert. Peptid-mapping zeigte, daß der Aminosäuren-Austausch in αTp III (typisches Peptid No. 3, AS-Reste 12–16 der α-Kette) vorliegt. Spezielle Färbungen und Aminosäuren-Analysen zeigten, daß Glycin in Pos. 15 durch Arginin ersetzt ist. Das Hb ist also α2 15argβ2. Da diese Mutation vorher nicht beschrieben wurde, wird die Bezeichnung “Hämoglobin Siam” vorgeschlagen.
    Notes: Summary A 28-year-old, healthy male of chinese ancestry with normal hematologic findings was found to have an abnormal hemoglobin moving more slowly than hemoglobin F in starch gel electrophoresis. The relative amounts of the abnormal component, hemoglobin A2 and slow hemoglobin A2, as determined by cellulose acetate electrophoresis, were 15.2, 1.64, and 0.56% respectively. The hemoglobin chain dissociation by p-chloromercuribenzoate treatment confirmed that it was an α-chain variant. The abnormal globin chain was fractionated by carboxymethyl cellulose chromatography. Peptide mapping revealed that the amino acid alteration occurs in αTp III (tryptic peptide No. 3, residues 12 to 16 of the α-chain). Special stains and amino acid analyses of the abnormal peptide indicated that glycine at residue 15 was replaced by arginine, and the hemoglobin is thus α2 15argβ2. Since the mutation has not been previously described, it is proposed that it be called “Hemoglobin Siam”.
    Type of Medium: Electronic Resource
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  • 4
    Electronic Resource
    Electronic Resource
    Springer
    Human genetics 〈Berlin〉 29 (1975), S. 121-126 
    ISSN: 1432-1203
    Source: Springer Online Journal Archives 1860-2000
    Topics: Biology , Medicine
    Notes: Summary In the Far East two types of α-thalassemia genes, namely α-thalassemia1 (α-thal1) and α-thalassemia2 (α-thal2) exist. Definite diagnosis of the α-thal1 and α-thal2 traits is very difficult because their hematological findings are minimally abnormal or normal. This study attempts to characterize the heterozygotes by hemoglobin chain synthesis in reticulocytes from obligatory cases of the α-thal1 and α-thal2 traits. Twelve parents of babies with hemoglobin Bart's hydrops fetalis (obligatory α-thal1 trait) had the mean total radioactivity α/β ratio of 0.76±SD 0.04, while that of 7 normal controls was 1.06±SD 0.04. The α/β globin chain ratios of 16 cases, who were either parents or offspring of patients with hemoglobin H disease, were found to segregate into 2 groups, i.e. 0.78±SD 0.03 (10 cases) and 0.92±SD 0.03 (6 cases), probably representing the α-thal1 and α-thal2 traits respectively. The hematological data of the first group showed definite hypochromic microcytic red cells, similar to thoseof the parents of the hydrops. The second group had significantly higher mean corpuscular hemoglobin than the first group, compatible with α-thal2 trait. Our globin chain synthesis study thus appears to be capable of discriminating normal, α-thal1 and α-thal2 traits.
    Type of Medium: Electronic Resource
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