TISSUE TRANSGLUTAMINASE ANTIBODY, IgG Mnemonic TTRANG Synonym Human RBC tTG - Native tTG - TG2 IgA - Tissue Transglutaminase - Tissue Transglutaminase Ab IgA - tTG IgA - tTG IGA - TTG-IgA Antibody Includes Tissue Transglutaminase Antibody, IgA ELISA and Interpretation Guidelines The endomysial antigen has been identified as the protein cross-linking enzyme known as tissue transglutaminase. Detection of tissue transglutaminase antibodies is an aid in the diagnosis of certain gluten-sensitive enteropathies, such as celiac disease and dermatitis herpetiformis. Human tTG antigen is utilized in this assay. Specimen Collection Requirements Collect Serum, one gold (SST) top tube View image for Supply Item Number - 101235 Handling Allow to clot, centrifuge and separate serum from cells immediately. Pour into a plastic tube. Refrigerate at 2-8°C. Freeze at -20°C if specimen cannot be assayed within 48 hours. Preferred Volume 1.0 mL Minimum Volume 0.5 mL Transport Refrigerated (2-8°C) or frozen on dry ice Rejection Criteria Plasma, microbially contaminated, heat-treated or specimens containing visible particulate, grossly hemolyzed or lipemic specimens should be avoided Stability AFTER SEPARATION FROM CELLS: Ambient (20-25°C): 8 hours; Refrigerated (2-8°C): 48 hours; Frozen (at or below -20°C): 2 months Testing Information Performed Mon, Wed, Fri Reported 24-72 hours Method Enzyme-Linked Immunosorbent Assay Reference Values Reference Values Less than or equal to 19.9 units CPT Codes 83516 Last Updated: Thursday, January 5, 2017 03:42:32 AM