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. Author manuscript; available in PMC: 2019 Jul 18.
Published in final edited form as: J Am Chem Soc. 2018 Jul 9;140(28):8965–8969. doi: 10.1021/jacs.8b05177

Figure 2.

Figure 2.

The proposed mechanism of Pol η. An undetermined base B deprotonates the O3’ of thymine, preparing it for the phosphoryl transfer reaction shown in this figure, followed by the possibility of a self-activating deprotonation of the incoming nucleotide (adenine) to protonate the leaving group, as indicated by a question mark.