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 Details

Days Test Performed

Monday - Friday

Analytic Time

5 days

Soft Order Code




Laboratory Reference

University of California San Diego

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Specimen Requirements

Offsite Collection Instructions

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

Special Handing

Must be received by UCSD within 24 hours


ACD Solution A

Normal Volume

5 mL Whole blood

Minimum Volume

2 mL whole blood

Additional Information

Test performed by: UCSD Cystine Detemination Unit Biochemical Genetics Laboratory

Billing Information

Fee Codes

CPT Code


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