Trait
Increased HbA2 hemoglobin
An elevated concentration in the blood of hemoglobin A2 (HbA2), which is a normal variant of hemoglobin A that consists of two alpha and two delta chains and is normally present at low levels in adults but may be increased in beta thalassemia.
Summary
- Also called
- Increased haemoglobin A2, Increased HbA2 haemoglobin, Increased hemoglobin A2
Reference genomeGRCh38hg38
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Get my Genome Test2 genes linked to Increased HbA2 hemoglobin
Changes in these genes cause rare conditions in which Increased HbA2 hemoglobin is seen. Most people with this trait have none of those conditions, and a gene on this list says nothing about anyone's own genome.
How often is among people with one of the gene's conditions, the most often across them, as the Human Phenotype Ontology records it. These pages describe traits and the research behind them; they are not a diagnosis, and a doctor or genetic counsellor is the person to ask about symptoms.
Broader traits
Where this comes from
- The Human Phenotype Ontology, release 2026-09-01: the trait, its names, its definition and the genes linked to it. Find out more at hpo.jax.org.
- Data release 2026.10.16-c6eea6bf.
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