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Laboratory Blood Test (Blood Work)

Published: August 9, 2026Updated: August 16, 2026

This test measures the activity or mass of the enzyme acetyl-CoA:glucosamine acetyltransferase in fibroblasts, which is involved in carbohydrate metabolism and glycosylation processes.

Quick summary

{"Measures enzyme activity involved in sugar metabolism","Uses skin cells (fibroblasts) for testing","Helps diagnose rare metabolic or genetic disorders","Results help doctors understand how your body processes certain sugars","More commonly used in research settings"}

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
24043-2
Short code
ACGAT
Synonyms
AcCoA:Glucosamine AT Fib-cCnt
Category
chemistry
Sample
serum
Container
Tissue culture container for fibroblasts or serum separator tube if serum sample is applicable
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
0–120 years
Method
Enzymatic assay using spectrophotometric or fluorometric detection
CPT
82657 (Enzyme activity, each) or 84999 (Unlisted chemistry test)
SNOMED
12609002 | Enzyme measurement (procedure) | or 394915008 | Fibroblast culture (procedure) |
Specimen volume
Variable depending on test methodology; typically 1-2 mL for serum or tissue culture flask for fibroblasts
Stability
Fibroblasts: maintain in culture medium at 37°C, process within 24-48 hours. Serum: refrigerate at 2-8°C if delay exceeds 2 hours.
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
168–336 hours
Order
routine

A laboratory blood test is a common diagnostic procedure in which a small sample of your blood is collected and analyzed in a medical laboratory to measure different components of your blood, evaluate organ function, and help detect infections, diseases, or other health conditions.

The acetyl-CoA:glucosamine acetyltransferase test measures how well this specific enzyme works in your cells. This enzyme plays an important role in how your body processes and uses certain sugars (carbohydrates) and is involved in a process called glycosylation, which affects how proteins function in your body.

The test is performed by a trained phlebotomist or nurse who cleans the skin on your arm, wraps a band around your upper arm, and draws a small amount of blood from a vein using a thin, sterile needle. The sample is then sent to a laboratory for analysis, and the entire procedure usually takes only a few minutes.

Unlike most blood tests that use blood samples, this test requires fibroblasts, which are cells found in skin tissue. A small skin sample (biopsy) is usually taken, and the cells are grown in a laboratory. The enzyme activity or amount is then measured in these cells.

Your doctor may order this test as part of a routine checkup, to help determine the cause of symptoms you are experiencing, to monitor an ongoing medical condition, to evaluate how well a treatment is working, or to screen for potential health risks before a procedure or surgery.

This test is typically ordered when doctors suspect a rare metabolic or genetic disorder that affects how the body processes certain sugars. It may be used to help diagnose conditions related to abnormal glycosylation or to understand certain inherited metabolic diseases.

The results show whether the measured values fall within normal reference ranges established for your age and sex. Abnormal results may suggest an infection, inflammation, anemia, organ dysfunction, or another condition, but they do not always mean you are ill. Your healthcare provider will interpret the findings together with your medical history and may recommend additional testing if needed.

Results are reported as enzyme activity levels or mass. Your doctor will interpret these results based on reference ranges and your specific clinical situation. Abnormal results may suggest an enzyme deficiency or dysfunction that could affect various body processes.

Reference range

Reference range is laboratory-specific and depends on methodology. Results should be interpreted in comparison to control fibroblast cultures. Typically expressed as nmol/min/mg protein or units/mg protein.N/A

Specimen: serum

For fibroblast culture: a skin biopsy is required. The biopsy site should be cleaned with antiseptic solution. Avoid application of topical medications to the biopsy site prior to collection. No fasting required for serum sample if applicable.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test helps doctors evaluate metabolic function related to carbohydrate processing. It may be used to diagnose or monitor certain inherited metabolic disorders, particularly those affecting glycosylation pathways. The results, combined with other clinical findings, help healthcare providers understand the underlying cause of certain symptoms and guide appropriate management.

Frequently asked questions

Is this a routine blood test?
No, this is a specialized test that requires skin cell samples and is typically performed in specialized reference laboratories. It is not part of routine blood work.
How long does it take to get results?
Since this test requires growing cells in a laboratory, it may take several weeks to get results. The exact time depends on the laboratory processing the sample.
Does this test hurt?
The skin biopsy may cause brief discomfort, similar to a small pinch. Local anesthesia is usually used to minimize pain during the procedure.
Do I need to fast before this test?
Since this test uses skin cells rather than blood, fasting is typically not required. However, always follow your doctor's specific instructions.
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This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy