@article {266726,
	title = {Anoxygenic photosynthesis modulate Proterozoic Oxygen},
	journal = {Proceedings of the National Academy of Science},
	volume = {106},
	number = {40},
	year = {2009},
	note = {
	
		
			
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},
	pages = {16925-16929},
	author = {Johnston, D. T. and F. Wolfe-Simon and A. Pearson and Knoll, A.H.}
}
