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There is now a CONTENT FREEZE for Mercury while we switch to a new platform. It began on Friday, March 10 at 6pm and will end on Wednesday, March 15 at noon. No new content can be created during this time, but all material in the system as of the beginning of the freeze will be migrated to the new platform, including users and groups. Functionally the new site is identical to the old one. webteam@gatech.edu
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Photosystem II is a complex of larger molecules arranged in a protein structure. It includes beta-carotene, chlorophyll, a manganese-calcium-oxygen cluster and a supporting protein stabilizer, which looks like a woven tube, in aqua-green in this illustration. Breathable oxygen, or O2, is produced in the bottom center, at the cluster, which would be at the top of the tubular stabilizing weave. Credit: Curtis Neveu via Wiki Commons sharing license
