Hemoglobin Mizuho or beta 68 (E 12) leucine leads to proline, a new unstable variant associated with severe hemolytic anemia. 1977

Y Ohba, and T Miyaji, and M Matsuoka, and K Sugiyama, and T Suzuki, and T Sugiura

A hitherto undescribed, unstable hemoglobin was discovered in a four-year-old Japanese girl with relatively severe hemolytic anemia requiring monthly blood transfusion. Although no abnormal hemoglobin was detectable by electrophoresis at pH 8.6 and 7.0, heat denaturation and isopropanol tests gave positive results. Chemical analyses of the heat labile hemoglobin have demonstrated an amino acid substitution of a prolyl for the leucyl residue at the beta 68th (E 12) position. Remarkable clinical improvement was observed after splenectomy.

UI MeSH Term Description Entries
D007564 Japan A country in eastern Asia, island chain between the North Pacific Ocean and the Sea of Japan, east of the Korean Peninsula. The capital is Tokyo. Bonin Islands
D007930 Leucine An essential branched-chain amino acid important for hemoglobin formation. L-Leucine,Leucine, L-Isomer,L-Isomer Leucine,Leucine, L Isomer
D010455 Peptides Members of the class of compounds composed of AMINO ACIDS joined together by peptide bonds between adjacent amino acids into linear, branched or cyclical structures. OLIGOPEPTIDES are composed of approximately 2-12 amino acids. Polypeptides are composed of approximately 13 or more amino acids. PROTEINS are considered to be larger versions of peptides that can form into complex structures such as ENZYMES and RECEPTORS. Peptide,Polypeptide,Polypeptides
D011392 Proline A non-essential amino acid that is synthesized from GLUTAMIC ACID. It is an essential component of COLLAGEN and is important for proper functioning of joints and tendons. L-Proline,L Proline
D002675 Child, Preschool A child between the ages of 2 and 5. Children, Preschool,Preschool Child,Preschool Children
D005260 Female Females
D006455 Hemoglobins, Abnormal Hemoglobins characterized by structural alterations within the molecule. The alteration can be either absence, addition or substitution of one or more amino acids in the globin part of the molecule at selected positions in the polypeptide chains. Abnormal Hemoglobins
D006801 Humans Members of the species Homo sapiens. Homo sapiens,Man (Taxonomy),Human,Man, Modern,Modern Man
D000595 Amino Acid Sequence The order of amino acids as they occur in a polypeptide chain. This is referred to as the primary structure of proteins. It is of fundamental importance in determining PROTEIN CONFORMATION. Protein Structure, Primary,Amino Acid Sequences,Sequence, Amino Acid,Sequences, Amino Acid,Primary Protein Structure,Primary Protein Structures,Protein Structures, Primary,Structure, Primary Protein,Structures, Primary Protein
D000743 Anemia, Hemolytic A condition of inadequate circulating red blood cells (ANEMIA) or insufficient HEMOGLOBIN due to premature destruction of red blood cells (ERYTHROCYTES). Anemia, Hemolytic, Acquired,Anemia, Microangiopathic,Haemolytic Anaemia,Hemolytic Anemia,Hemolytic Anemia, Acquired,Microangiopathic Hemolytic Anemia,Acquired Hemolytic Anemia,Anaemia, Haemolytic,Anemia, Acquired Hemolytic,Anemia, Microangiopathic Hemolytic,Haemolytic Anaemias,Hemolytic Anemia, Microangiopathic,Microangiopathic Anemia,Microangiopathic Hemolytic Anemias

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