MODIFIED TEMPLATE-INDEPENDENT ENZYMES FOR POLYDEOXYNUCLEOTIDE SYSTHESIS

摘要

The invention includes methods for identifying polymerases, such as modified terminal nucleotidyl transferases (TdT), that are capable of binding nucleotides comprising removable 3'- O-blocking moieties to a nucleic acid initiator, without the use of a template. The invention further includes the identified polymerases, and methods of using the polymerases for de novo synthesis of predetermined oligonucleotide sequences.