Summary
It has been demonstrated that the carotenoid pigments of Sarcina lutea prevent photodynamic killing by either exogenous or endogenous photosensitizers.
Evidence has been presented which suggests that the locus of the lethal photooxidation is in or on the cell membrane.
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Mathews, M.M., Sistrom, W.R. The function of the carotenoid pigments of sarcina lutea. Archiv. Mikrobiol. 35, 139–146 (1960). https://doi.org/10.1007/BF00425002
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DOI: https://doi.org/10.1007/BF00425002