Method Description Describes how the test is performed and provides a method-specific reference
The beta-galactosidase activity measured in this assay is 1 of the lysosomal enzymes which act at an acidic pH. It is present in liver, kidney, brain, fibroblasts, and leukocytes. Its natural substrate appears to be monosialoganglioside (GM1 ganglioside). The enzyme also hydrolyzes artificial substrates such as p-nitrophenyl beta-D-galactopyranoside and 4-methylumbelliferyl beta-D-galacto-pyranoside. The 4-methylumbelliferone produced is measured fluorometrically.(Modified from Ho MW, O'Brien JS: Differential effect of chloride ions on beta-galactosidase isoenzymes: a method for separate assay. Clin Chim Acta 1971;32:443-450; Gehler J, Cantz M, Tolksdorf M, Spranger J: Mucopolysaccharidosis. VII. Beta-glucuronidase deficiency. Humangenetik 1974;23:149-158)
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.
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.
30-45 days depending on rapidity of growth
Maximum Laboratory Time Defines the maximum time from specimen receipt at Mayo Medical Laboratories until the release of the test result
Specimen Retention Time Outlines the length of time after testing that a specimen is kept in the laboratory before it is discarded
3 years - Check with the lab for availability
Performing Laboratory Location The location of the laboratory that performs the test