Abstract:The coccoliths that form the outer cell covering of the unicellular coccolithophores are assembled in a coccolith vesicle. The coccolith vesicle maintains the conditions and protein carriers sufficient to import the raw materials (Ca 2+ and CO 3 2-) for calcite formation and, furthermore, to initiate and sustain mineralization. We have isolated the coccolith vesicle membrane on which a proton-pumping, vacuolar ATPase has been localized. The V-ATPase has been characterized and its membrane-spanning subunit c ha… Show more
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