Glucose-6-Phosphate Dehydrogenase (G6PD) 2 Mutations
Ordering Recommendation

Preferred test for individuals of African descent. Detects the single most common pathogenic G6PD variant (A- allele) in individuals of African descent.
For initial screening for GP6D deficiency, refer to Glucose-6-Phosphate Dehydrogenase (0080135).

Polymerase Chain Reaction/TaqMAN
Mon, Thu
4-10 days
New York DOH Approval Status
This test is New York DOH approved.
Submit With Order
ARUP Consult®
Disease Topics
Specimen Required
Patient Preparation
Lavender (EDTA), pink (K2EDTA), or yellow (ACD Solution A or B). 
Specimen Preparation
Transport 3 mL whole blood. (Min: 1 mL) 
Storage/Transport Temperature
Unacceptable Conditions
Ambient: 72 hours; Refrigerated: 1 week; Frozen: Unacceptable 
Reference Interval
Interpretive Data
Background Information for Glucose-6-Phosphate Dehydrogenase (G6PD) 2 Mutations:
G6PD deficiency can cause chronic hemolytic anemia, food-, drug- and infection-mediated acute hemolytic anemia, and neonatal jaundice. Most mutations identified to-date have been classified according to the following scheme: Class I - severe enzyme deficiency with chronic non-spherocytic hemolytic anemia (CNSHA); Class II - severe enzyme deficiency with less than 10 percent of the normal activity; Class III - mild to moderate enzyme deficiency (10 to 60 percent of normal activity); and Class IV - very mild to almost normal enzyme activity (greater than 60 percent normal activity with no clinical consequences).
Drug Sensitivities:
Adriamycine and other anthracycline chemotherapy agents, Dapsone, Flutamide, Mafenide cream, Methylene blue, Nalidixic acid, Nitrofurantoin, Phenazopyridine, Primaquine, Rasburicase, Sulfacetamide, Sulfamethoxazole, and Sulfanilamide.
Varies by ethnicity; 7 in 10 Kurdish Jewish males; 1 in 6 to 10 African American males; 1 in 7 to 9 Arabic males; 1 in 6 to 16 Southeast Asian males.
X-linked recessive.
Deleterious mutations in only the Glucose-6-Phosphate Dehydrogenase (G6PD) gene.
Mutations Tested:
c.376A>G and c.202G>A (A- allele: both mutations present in cis; A+ allele: c.376A>G alone; c.202G>A is rarely if ever seen alone).
Clinical Sensitivity:
99 percent in individuals of African descent.
Allele-specific hydrolysis probes (TaqMan) and fluorescent monitoring.
Analytical Sensitivity and Specificity:
99 percent.
Only the two G6PD gene mutations targeted (c.376A>G and c.202G>A) will be detected; analytical sensitivity may be affected by rare primer or probe site mutations. Diagnostic errors can occur due to rare sequence variations.

Statement C: Compliance Statement C: For human genetic inheritable conditions and mutations. This test was developed and its performance characteristics determined by ARUP Laboratories. The U. S. Food and Drug Administration has not approved or cleared this test; however, FDA clearance or approval is not currently required for clinical use. The results are not intended to be used as the sole means for clinical diagnosis or patient management decisions.

Counseling and informed consent are recommended for genetic testing. Consent forms are available online.

This assay detects the following mutations: A376G and G202A in the G6PD gene.
Hotline History
Component Test Code*Component Chart NameLOINC
0051671G6PD Allele 121681-2
0051679G6PD Allele 221681-2
0051687G6PD Mutations Interpretation21680-4
2001311G6PD Africa Specimen31208-2
* Component test codes cannot be used to order tests. The information provided here is not sufficient for interface builds; for a complete test mix, please view this test within the Laboratory Test Directory found at
  • G-6-PD Mutations, African Alleles
  • RBC G6PD mutation assay