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Immunoglobulin G Subclasses, Subgroups or Subtypes

Source Blood
Mnemonic IGGSUB
Specimen Requirements

1 x 3.5 mL gold top SST tube

AND 1 x 3.0 mL light green (mint) top PST tube for Total IgG

0.5 mL serum and 0.5 mL plasma

PSC only: 1 x 5 mL orange top RST tube is acceptable within one hour of lab closing

Specimen Handling

Additional Information

Includes IgG1, IgG2, IgG3, IgG4.
Ordering IGGSUB also includes a Total IgG test.

Testing Location Immunochemistry
Testing Frequency Weekly
Alternate Name(s) IgG Subclasses, IgG Subgroups, IgG Subtypes
Reference Interval
 Subclass    Male/Female 0-150 years  
 IgG1  3.82 - 9.29 g/L
 IgG2  2.42 - 7.00 g/L
 IgG3  0.22 - 1.76 g/L
 IgG4  0.04 - 0.86 g/L