Test Overview
Reference Range *

<0.2 nmol half cystine/ mg protein

* Reference ranges may change over time. Please refer to the original patient report when evaluating results.

Test Limitations

Specimen MUST be received by lab within 1 day of collection.

Test Details
Days Set Up
Monday - Friday
Analytic Time

5 days

Soft Order Code
CYSTG
Laboratory
Sendout
Reference Laboratory
University of California San Diego
Section
Special Testing
Specimen Requirements
Collection

Collect Mon - Thurs before 4pm.

Collection Instructions

Collect specimen in ACD solution A tube. Refrigerate within an hour of collection. Send to Specimen Processing refrigerated. Draw Mon- Thurs only before 4 pm

Special Handling

Must be received by UCSD the day after collection.

Rejection Criteria
Specimen will be around > 24 hours old when received by UCSF. The day following collection is acceptable.
ACD Solution A
Normal Volume
5 mL Whole blood
Minimum Volume
2 mL whole blood
Storage Temperature
Refrigerated only
Additional Information

Test performed by: UCSD Cystine Detemination Unit Biochemical Genetics Laboratory

Billing
CPT Code
83789
Fee Code
AA352
Resources