Test Catalog

Test ID: CDG    
Carbohydrate Deficient Transferrin for Congenital Disorders of Glycosylation, Serum

Method Description Describes how the test is performed and provides a method-specific reference

Samples are prepared by diluting serum in water. The sample is injected into an immunoaffinity column and washed. Following 2 wash steps, proteins are then eluted and introduced into an API 4000 tandem mass spectrometer equipped with a Turbo V source configured for electrospray ionization. The mass spectrometer is operated in positive Q1 scan mode with 2 scan ranges; m/z 1090-2000 for apolipoprotein CIII and m/z 2000-3000 for transferrin. Relative quantitation of carbohydrate deficient transferrin and apolipoprotein CIII is achieved by comparing glycoform ratios in each protein.(Lacey JM, Bergen R, Magera MJ, et al: Rapid determination of transferrin isoforms by immunoaffinity liquid chromatography and electrospray mass spectrometry. Clin Chem 2001;47:513-518)

PDF Report Indicates whether the report includes an additional document with charts, images or other enriched information


Day(s) and Time(s) Test Performed Outlines the days and times the test is performed. This field reflects the day and time the sample must be in the testing laboratory to begin the testing process and includes any specimen preparation and processing time required before the test is performed. Some tests are listed as continuously performed, which means assays are performed several times during the day.

Tuesday; 8 a.m.

Analytic Time Defines the amount of time it takes the laboratory to setup and perform the test. This is defined in number of days. The shortest interval of time expressed is "same day/1 day," which means the results may be available the same day that the sample is received in the testing laboratory. One day means results are available 1 day after the sample is received in the laboratory.

5 days (Not reported Saturday or Sunday)

Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Clinic Laboratories until the release of the test result

10 days

Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded

1 month

Performing Laboratory Location Indicates the location of the laboratory that performs the test