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. 2011 Dec 14;109(1):39-43. doi: 10.1073/pnas.1115778108

Fig. 4.

Fig. 4.

Strategy for the construction of a photoRNR-β2. The attachment of the PO, [Re ] = [Re(phen)(CO)3(PyCH2Br)] via the methylene group of the pyridyl ligand of the rhenium center is shown schematically. Radical initiation at Y356: (1) a 355 nm laser pulse generates the [Re]* excited state, which (2) is quenched to produce (3) the [ReII] species, which oxidizes Y356, to regenerate the [ReI] ground state and the radical. (4) The photogenerated Y356 radical is observed and monitored by transient absorption spectroscopy. Graphics were generated from Protein Data Bank entry 1MXR (β2) (15).