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. 2003 May 28;100(12):7069–7074. doi: 10.1073/pnas.1231856100

Fig. 2.

Fig. 2.

IR spectra of MbCO L29W-S108L at 3 K in the region of the heme-bound CO and photodissociated CO. Dashed line, 1-s illumination at 3 K (state B); solid line, slow cooling under light from 100 to 80 K and further to 3 K in the dark (state C).