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Hemoglobin variants occur when there are mutations in specific genes that code for the protein chains, known as globins, which make up the hemoglobin molecule. This leads to amino acid substitutions in the hemoglobin molecule that could affect the structure, properties, and/or the stability of the hemoglobin molecule.
Hemoglobin D (HbD) is a variant of hemoglobin, a protein complex that makes up red blood cells. Based on the locations of the original identification, it has been known by several names such as hemoglobin D-Los Angeles , hemoglobin D-Punjab , [ 1 ] D-North Carolina , D-Portugal , D-Oak Ridge , and D-Chicago. [ 2 ]
n/a Ensembl ENSG00000223609 n/a UniProt P02042 n/a RefSeq (mRNA) NM_000519 n/a RefSeq (protein) NP_000510 n/a Location (UCSC) Chr 11: 5.23 – 5.24 Mb n/a PubMed search n/a Wikidata View/Edit Human Hemoglobin subunit delta is a protein that in humans is encoded by the HBD gene. Function The delta (HBD) and beta (HBB) genes are normally expressed in the adult: two alpha chains plus two beta ...
Unstable hemoglobin variants are mutations that cause the hemoglobin molecule to precipitate, spontaneously or upon oxidative stress, resulting in hemolytic anemia. Precipitated, denatured hemoglobin can attach to the inner layer of the plasma membrane of the red blood cell (RBC) forming Heinz bodies , leading to premature destruction of the ...
Hemoglobin Lepore syndrome is typically an asymptomatic hemoglobinopathy, which is caused by an autosomal recessive genetic mutation.The Hb Lepore variant, consisting of two normal alpha globin chains (HBA) and two delta-beta globin fusion chains which occurs due to a "crossover" between the delta (HBD) and beta globin (HBB) gene loci during meiosis and was first identified in the Lepore ...
The most commonly used method for Hemoglobin analysis used is alkaline cellulose acetate electrophoresis at pH 8.6, due to its ability to split hemoglobin into its common variants, however a review of the College of American Pathologists (CAP) Hemoglobinopahty Survey Reports has provided the number of laboratories that utilise high-performance ...
These two variants have distinctions with the alpha and beta-globin chains. HbA2 is a vital component for screening programs targeting beta-thalassemia and hemoglobin pathogens. Typically the normal HbA2 levels range from 2.1% to 3.2%, but these values may change based on individual factors and different hemoglobin or hematological patterns. [3]
Within the medical specialty of hematology, Hemoglobin D-Punjab, also known as hemoglobin D-Los Angeles, [1] D-North Carolina, D-Portugal, D-Oak Ridge, and D-Chicago, [2] is a hemoglobin variant. It originates from a point mutation in the human β-globin locus and is one of the most common hemoglobin variants worldwide. [ 1 ]
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