Frequently Asked Questions Live Chat and Frequently Asked Questions are available for this Product. Biochem/physiol Actions Methotrexate is an allosteric inhibititor of dihydrofolate reductase (DHFR), the enzyme that catalyzes the conversion of dihydrofolate to tetrahydrofolate. Since tetrahydrolfolate is required for purine and pyrimidine synthesis, methotrexate treatment results in the inhibition of DNA and RNA synthesis. Application Potent inhibitor of dihydrofolate reductase1 and agent for antitumor studies.2,3 Use to inhibit dihydrofolate reductase in DHFR-based protein expression systems. Also effective in treatment of pyrimethamine-resistant Plasmodium vivax malaria parasites.4 Potent inhibitor of dihydrofolate reductase1 and agent for antitumor studies.2,3 Use to inhibit dihydrofolate reductase in DHFR-based protein expression systems. Also shows immunosuppressive effects in, e.g., rheumatoid arthritis. |