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Test ID PFK1 Phosphofructokinase Enzyme Activity, Blood

Specimen Required

Collection Container/Tube:

Preferred: Yellow top (ACD solution B)

Acceptable: Lavender top (EDTA)

Specimen Volume: 6 mL

Collection Instructions: Send specimen in original tube. Do not transfer blood to other containers.

Useful For

Evaluation of individuals with Coombs-negative nonspherocytic hemolytic anemia


Evaluation of individuals with exercise intolerance or myopathy


Genetic studies in families with phosphofructokinase deficiency

Method Name

Kinetic Spectrophotometry

Reporting Name

Phosphofructokinase, B

Specimen Type

Whole Blood ACD-B

Specimen Minimum Volume

1 mL

Specimen Stability Information

Specimen Type Temperature Time Special Container
Whole Blood ACD-B Refrigerated 11 days

Reference Values

≥12 months of age: 5.8-10.9 U/g Hb

Reference values have not been established for patients who are <12 months of age.

Performing Laboratory

Mayo Clinic Laboratories in Rochester

CPT Code Information


LOINC Code Information

Test ID Test Order Name Order LOINC Value
PFK1 Phosphofructokinase, B 72664-6


Result ID Test Result Name Result LOINC Value
PFKCL Phosphofructokinase, B 72664-6

NY State Approved


Test Classification

This test was developed, and its performance characteristics determined by Mayo Clinic in a manner consistent with CLIA requirements. This test has not been cleared or approved by the US Food and Drug Administration.

Day(s) Performed

Performed weekly, varies

Report Available

5 days