Test ID: BGA
Beta-Galactosidase, Leukocytes
Method Description 
Describes how the test is performed and provides a method-specific reference
The deficiency of beta-galactosidase is demonstrable using the artificial substrate 4-methylumbelliferyl-beta-D-galactopyranoside. The enzyme hydrolyzes the artificial substrate to produce 4-methylumbelliferone, which is measured fluorometrically.(Modified from Ho MW, O'Brien JS: Differential effect of chloride ions on galactosidase isoenzymes: a method for separate assay. Clin Chim Acta 1971 May;32[3]:443-450; Gehler J, Cantz M, Tolksdorf M, et al: Mucopolysaccharidosis. VII. Beta-glucuronidase deficiency. Humangenetik 1974 July 15;23[2]:149-158)
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.
Specimens are processed Monday through Sunday.
Assay is performed on Wednesday; varies.
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.
8 days
Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result
15 days
Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
White cell pellet retained 1 month
Performing Laboratory Location The location of the laboratory that performs the test
Rochester
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