Granger Genetics employs the most current technology to deliver accurate and reliable results to clinicians. Granger specializes in asparaginase testing offering two assays for monitoring patients on asparaginase therapy. The L-asparaginase assays are laboratory developed tests (LDT) to determine the enzyme activity of L-asparaginase or presence of anti-asparaginase antibodies in patients who have been treated with Oncaspar® or Erwinaze®. Our Goal: Optimal diagnosis for optimal patient care.