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Descriptor English: Hemoglobin A2
Descriptor Spanish: Hemoglobina A2
Descriptor hemoglobina A2
Scope note: Componente de la hemoglobina del adulto presente normalmente en hemodializados de hematíes humanos en concentraciones de aproximadamente 3 por ciento. La hemoglobina está compuesta de dos cadenas alfa y dos cadenas delta. El porcentaje de HbA2 varía en algunos trastornos hematológicos, pero es de aproximadamente el doble en la talasemia beta.
Descriptor Portuguese: Hemoglobina A2
Descriptor French: Hémoglobine A2
Entry term(s): A2, Hemoglobin
Tree number(s): D12.776.124.400.405.450
D12.776.422.316.762.380.450
RDF Unique Identifier: https://id.nlm.nih.gov/mesh/D006443
Scope note: An adult hemoglobin component normally present in hemolysates from human erythrocytes in concentrations of about 3%. The hemoglobin is composed of two alpha chains and two delta chains. The percentage of HbA2 varies in some hematologic disorders, but is about double in beta-thalassemia.
Annotation: /urine: coordinate with HEMOGLOBINURIA
Allowable Qualifiers: AA analogs & derivatives
AD administration & dosage
AE adverse effects
AG agonists
AI antagonists & inhibitors
AN analysis
BI biosynthesis
CF cerebrospinal fluid
CH chemistry
CL classification
CS chemical synthesis
DE drug effects
DF deficiency
EC economics
GE genetics
HI history
IM immunology
IP isolation & purification
ME metabolism
PD pharmacology
PH physiology
PK pharmacokinetics
PO poisoning
RE radiation effects
SD supply & distribution
ST standards
TO toxicity
TU therapeutic use
UL ultrastructure
UR urine
Registry Number: 9034-53-1
CAS Type 1 Name: Hemoglobin A2
Previous Indexing: Hemoglobin A (1977-1978)
Hemoglobins (1966-1976)
Public MeSH Note: 91; was see under HEMOGLOBIN A 1979-90
History Note: 91(79); was see under HEMOGLOBIN A 1979-90
Entry Version: HBA2
DeCS ID: 22191
Unique ID: D006443
Documents indexed in the Virtual Health Library (VHL): Click here to access the VHL documents
Date Established: 1991/01/01
Date of Entry: 1978/05/18
Revision Date: 2008/07/08
Hemoglobin A2 - Preferred
Concept UI M0010117
Scope note An adult hemoglobin component normally present in hemolysates from human erythrocytes in concentrations of about 3%. The hemoglobin is composed of two alpha chains and two delta chains. The percentage of HbA2 varies in some hematologic disorders, but is about double in beta-thalassemia.
Preferred term Hemoglobin A2
Entry term(s) A2, Hemoglobin



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