Patent ID: 11739359

Abstract:
A universal template strand built with universal base analogs is used as a template for polynucleotide synthesis. The universal template strand can hybridize to any sequence of nucleotides. A new polynucleotide is synthesized by using a polymerase to extend a primer hybridized to the universal template strand. Unlike primer extension in polymerase chain reactions, base pairing with nucleotides in the template strand does not specify the sequence of the new polynucleotide. Instead, the sequence of the new polynucleotide is specified by the order of addition of protected nucleotides. After addition of a single species of protected nucleotide, the blocking group is removed and another protected nucleotide is added. The order of nucleotide addition can be varied to create any sequence. After synthesis, the polynucleotide can be dehybridized from the universal template strand. The universal template strand may then be reused to synthesize a different polynucleotide.