rs33949869

This is a variant in the HBB gene that changes a tyrosine to an histidine.

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ClinVar annotation

Pathogenic★☆☆☆

2 submitters12 publications

Erythrocytosis, familial, 6; HEMOGLOBIN BETHESDA

About HBB

The alpha (HBA) and beta (HBB) loci determine the structure of the 2 types of polypeptide chains in adult hemoglobin, Hb A. The normal adult hemoglobin tetramer consists of two alpha chains and two beta chains. Mutant beta globin causes sickle cell anemia. Absence of beta chain causes beta-zero-thalassemia. Reduced amounts of detectable beta globin causes beta-plus-thalassemia. The order of the genes in the beta-globin cluster is 5'-epsilon -- gamma-G -- gamma-A -- delta -- beta--3'. [provided by RefSeq, Jul 2008]

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Gene information from NCBI Gene. Variant classifications from ClinVar.

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