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Test Code U Sulfocysteine Urine Sulfocysteine Determination

Clinical System Name

Urine Sulfocysteine Determination


U Sulfocysteine


This test provides quantitative analysis of Sulfocysteine in Urine. This test is useful in the diagnosis of Sulfocysteinuria and Molybdenum Cofactor Deficiency.


Sample Requirements

Specimen: Urine

Container(s): Sterile Screw-capped Container

Preferred Vol: 4.0 mL

Minimum Vol: 2.0 mL


Notes: Freeze the specimen immediately after collection at -80 C if possible. DO NOT add preservatives.


Processing Instructions

Reject due to:

Spin: N

Aliquot: N

Temp: -70 C

Storage location: Aliquot a maximum of 10.0 mL urine into a Falcon tube. Place the aliquot in the CPA -70 freezer, Send Outs rack ASAP.


Off-site collection:


Specimen Type Temperature Time
Urine -80 C 1 w



N 19 d


Performing Laboratory

Baylor College of Medicine

Baylor Genetics Laboratories

2450 Holcombe - Grand Blvd Dock

Houston, TX 77021-2024


Phone: (800) 411-4363



Department: Send Outs

Phone Number: (206) 987-2563

Reference Range

Interpretive report is provided.


Method: Tandem Mass Spectroscopy

Analytical Volume:


CPT Codes

82570x1, 83789x1

Special Instructions

Links to:

Baylor Medical Genetics Lab


Send Out Instructions

Reference Test Name: Sulfocysteine Determination - Urine
Reference Test Number: 4225
Instructions: Send frozen overnight to Baylor via FedEx. Will accept Saturday deliveries.