Biomarker Lens

Common biomarkers

  • Hemoglobin
  • Glucose
  • ALT
  • Apolipoprotein B
  • C-Reactive Protein, Cardiac
  • Ferritin
  • Alb/Creat Ratio, Urine
  • Alkaline Phosphatase
  • FSH
  • T4,Free(Direct)

Biomarkers · Chemical

Hgb A2

Primary unit
%
LOINC codes
4552-6
Tests that measure Hgb A2
Labcorp 3

Tests

Check the catalog code, specimen, method and preparation for every test that measures Hgb A2. Select up to five tests to compare them side by side.

Labcorp 3 tests

Single-analyte tests

  • Hemoglobin (Hb) A2, Quantitative 121060

    Blood · Fasting not stated · Turnaround 2 - 5 days

    Method and collection
    Method
    Capillary electrophoresis (CE)
    Preparation
    Fasting or fluid restriction is not necessary.
    Collection
    To avoid delays in turnaround time, please submit a separate lavender-top tube for each test requiring a lavender-top .
    Reference notes
    See table. Age Percentage <7 m Not established 7 m to 1 y 1.9% to 2.8% ≥2 y 1.8% to 3.2%
    Labcorp catalog page

Panels that include this biomarker

  • Hemoglobinopathy Fractionation Cascade 121690

    4 analytes · Specimen not stated · Fasting not stated · Turnaround 4 - 6 days

    Method and collection
    Method
    Capillary electrophoresis (CE); high-pressure liquid chromatography (HPLC); Hgb Solubility: Sodium hydrosulfite reduction
    Preparation
    Fasting or fluid restriction is not necessary.
    Collection
    To avoid delays in turnaround time, please submit a separate lavender-top tube for each test requiring a lavender-top.
    Reference notes
    • Hb A: – <7 months: Not established – 7 months to 1 year: 94.6% to 98.5% − ≥2 years : 96.4% to 98.8% • Hb F: − <7 months: Not established − 7 months to 1 year: 0.1% to 6.8% − ≥2 years : 0.0% to 2.0% • Hb S, D, G: 0% • Hb C, E, O: 0% • Hb A2: – <7 months: Not established – 7 months to 1 year: 1.9% to 2.8% – ≥2 years: 1.8% to 3.2% • Hemoglobin solubility: Negative
    Labcorp catalog page

  • Hemoglobinopathy Fractionation Cascade With Reflex to α-Thalassemia 121363

    15 analytes · Serum · Fasting not stated · Turnaround 4 - 8 days

    Method and collection
    Method
    CBC : Automated cell counter; ferritin : electrochemiluminescence immunoassay (ECLIA); hemoglobin fractionation cascade : capillary electrophoresis (CE), high-pressure liquid chromatography (HPLC); hemoglobin solubility : sodium hydrosulfite reduction If reflexed to a-thalassemia DNA test : polymerase chain reaction (PCR) and multiplex ligation-dependent probe amplification (MLPA) Alpha-globin variants included in the analysis are the Constant Spring non-deletion variant and the following deletions: -alpha3.7, -alpha4.2, --alpha20.5, --SEA, --FIL, --THAI, --MED, and the HS-40 regulatory region
    Collection
    Lavender-top (EDTA) tubes should be filled to capacity and inverted 8 to 10 times immediately after tube is filled, at the time of collection. If a red-top tube is used for serum, transfer separated serum to a plastic transport tube.
    Labcorp catalog page

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Sources

Verify these ranges and sources

We compile this page from named laboratory catalogs, guidelines and studies. Labs calculate reference intervals from the people they test, for one assay method and one population group, so an interval describes that population rather than an optimal target.

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