Polynucleotide synthesis performed with a substrate independent polymerase such as terminal deoxynucleotidyl transferase (TdT) is regulated by controlling the oxidation state of a metal cofactor. The oxidation state of the metal cofactor is changed to +2, thus activating the polymerase, by applying a voltage with electrodes or by introducing a chemical redox reagent. Addressable polynucleotide synthesis creates polynucleotides with different arbitrary sequences through use of spatial control of cofactor oxidation states to add nucleotides only at selected locations on an array. Control of metal oxidation states is regulated by selective activation of a microelectrode array, controlled addition of redox reagents to specific locations on the array, or controlled activation of photocatalysts at specific locations on the array. Scavengers in solution prevent cofactors distant from the selected locations from catalyzing polymerase activity and thereby maintain the localized effect of polymerase activation.

Polynucleotide synthesis performed with a substrate independent polymerase such as terminal deoxynucleotidyl transferase (TdT) is regulated by controlling the oxidation state of a metal cofactor. The oxidation state of the metal cofactor is changed to +2, thus activating the polymerase, by applying a voltage with electrodes or by introducing a chemical redox reagent. Addressable polynucleotide synthesis creates polynucleotides with different arbitrary sequences through use of spatial control of cofactor oxidation states to add nucleotides only at selected locations on an array. Control of metal oxidation states is regulated by selective activation of a microelectrode array, controlled addition of redox reagents to specific locations on the array, or controlled activation of photocatalysts at specific locations on the array. Scavengers in solution prevent cofactors distant from the selected locations from catalyzing polymerase activity and thereby maintain the localized effect of polymerase activation.

An adenosine-involved fully enzymatic synthesis method for NMN includes the steps under the same reaction system: (A) reacting, under the catalytic action of a yeast cell, adenosine, phosphate and sugar that is metabolizable by a yeast cell, so as to generate ATP; and (B) generating NMN by an enzymatic reaction including the step of under the action of NAMPT, reacting nicotinamide, PRPP and ATP to generate NMN, ADP and phosphate. In this way, a series of reactions such as the generation (regeneration) of ATP, the synthesis of NMN and the utilization of ATP are performed in one reaction system in a unified manner, and thus efficient synthesis of NMN can be implemented.

An adenosine-involved fully enzymatic synthesis method for NMN includes the steps under the same reaction system: (A) reacting, under the catalytic action of a yeast cell, adenosine, phosphate and sugar that is metabolizable by a yeast cell, so as to generate ATP; and (B) generating NMN by an enzymatic reaction including the step of under the action of NAMPT, reacting nicotinamide, PRPP and ATP to generate NMN, ADP and phosphate. In this way, a series of reactions such as the generation (regeneration) of ATP, the synthesis of NMN and the utilization of ATP are performed in one reaction system in a unified manner, and thus efficient synthesis of NMN can be implemented.

Provided herein are composition and process for using an electrochemical device for the reduction of the oxidized state of phosphorylated or non-phosphorylated nicotinamide adenine dinucleotide to the reduced state in which unwanted products of the electrochemical reduction are recovered as the oxidized state of the phosphorylated or non-phosphorylated nicotinamide adenine dinucleotide and returned to the electrochemical device for reduction.

Provided herein are composition and process for using an electrochemical device for the reduction of the oxidized state of phosphorylated or non-phosphorylated nicotinamide adenine dinucleotide to the reduced state in which unwanted products of the electrochemical reduction are recovered as the oxidized state of the phosphorylated or non-phosphorylated nicotinamide adenine dinucleotide and returned to the electrochemical device for reduction.

Provided herein a re composition and process for using an electrochemical device for the reduction of the oxidized state of phosphorylated or non-phosphorylated nicotinamide adenine dinucleotide to the reduced state in which unwanted products of the electrochemical reduction are recovered as the oxidized state of the phosphorylated or non-phosphorylated nicotinamide adenine dinucleotide and returned to the electrochemical device for reduction.

Provided herein a re composition and process for using an electrochemical device for the reduction of the oxidized state of phosphorylated or non-phosphorylated nicotinamide adenine dinucleotide to the reduced state in which unwanted products of the electrochemical reduction are recovered as the oxidized state of the phosphorylated or non-phosphorylated nicotinamide adenine dinucleotide and returned to the electrochemical device for reduction.

Polynucleotide synthesis performed with a substrate independent polymerase such as terminal deoxynucleotidyl transferase (TdT) is regulated by controlling the oxidation state of a metal cofactor. The oxidation state of the metal cofactor is changed to +2, thus activating the polymerase, by applying a voltage with electrodes or by introducing a chemical redox reagent. Addressable polynucleotide synthesis creates polynucleotides with different arbitrary sequences through use of spatial control of cofactor oxidation states to add nucleotides only at selected locations on an array. Control of metal oxidation states is regulated by selective activation of a microelectrode array, controlled addition of redox reagents to specific locations on the array, or controlled activation of photocatalysts at specific locations on the array. Scavengers in solution prevent cofactors distant from the selected locations from catalyzing polymerase activity and thereby maintain the localized effect of polymerase activation.

Polynucleotide synthesis performed with a substrate independent polymerase such as terminal deoxynucleotidyl transferase (TdT) is regulated by controlling the oxidation state of a metal cofactor. The oxidation state of the metal cofactor is changed to +2, thus activating the polymerase, by applying a voltage with electrodes or by introducing a chemical redox reagent. Addressable polynucleotide synthesis creates polynucleotides with different arbitrary sequences through use of spatial control of cofactor oxidation states to add nucleotides only at selected locations on an array. Control of metal oxidation states is regulated by selective activation of a microelectrode array, controlled addition of redox reagents to specific locations on the array, or controlled activation of photocatalysts at specific locations on the array. Scavengers in solution prevent cofactors distant from the selected locations from catalyzing polymerase activity and thereby maintain the localized effect of polymerase activation.