Tandem Mass Spectroscopy
Provides quantitative analysis of Cystine in wbc's
Normal range: <0.2 nmoles 1/2 cys/mg protein
White Blood Cell cystine levels are sensitive to sample handling and can decrease with time. When whole blood is sent to the laboratory, it is extremely important that the sample arrive in our laboratory within 36 hours of sample draw.
8 - 10 days
Collect specimen in an ACD yellow top tube. Sent to Specimen Processing in a green bag. Draw Monday - Thursday before 4 pm.
Draw Monday - Friday only (prefer Monday - Thursday) before 4 pm. Sample MUST arrive at Baylor within 36 hrs of collection.
Include a room temp ice pack to prevent temperature changes while shipping
Test is performed by Baylor College of Medicine, Medical Genetics