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. Author manuscript; available in PMC: 2015 Apr 9.
Published in final edited form as: Chem Rev. 2014 Mar 3;114(7):3659–3853. doi: 10.1021/cr400327t

Figure 225.

Figure 225

Orbital overlap of key frontier molecular orbitals showing the electron transfer process during our proposed concerted mechanism for O2 attack on the [Cu(His)3(Tyr)]+ site in TPQ biogenesis. Blue indicates orbitals involved in the transfer of a beta spin electron, red indicates orbitals involved in the transfer of an alpha spin electron.