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Does IDT offer universal bases?

IDT offers 5’ nitroindole and deoxyinosine. 5’ Nitroindole does not favor any partic­ular base pairing, but does contribute to duplex stability. Deoxyinosine, often used as a universal base, displays some bias in base pairing, but is less destabilizing than mismatches involving the four standard bases. For more information, see the article, DeoxyInosine: Don’t Call Me a Universal Base!