Calcium Binding Substance in the Hermatypic Coral, Acropora Hebes (Dana)

  • Yeishin Isa


A characteristic of skeleton formation in the hermatypic coral Acropora hebes has been investigated with special reference to the calcium-binding substance assay. The skeletal soluble organic matrix such as protein and carbohydrate did not bind calcium ions in the Sephadex G-75 chromatography. On the other hand, the insoluble organic matrix of the skeleton showed the calcium-binding ability, which was reduced by treatment with the organic solvent. Presumably, the calcium-binding substances in the skeletal insoluble matrix are firmly attached to the calcium carbonate crystals and will not be extracted by the aqueous or organic extracting solutions. The major component of the calcium-binding substances in the skeleton is phospholipid, but not the other lipids such as neutral lipid or glycolipid. A high-performance TLC revealed that the skeletal calcium-binding phospholipids consisted mainly of acidic phosphatidylserine.


Organic Matrix Matrix Vesicle Hermatypic Coral Calcium Carbonate Crystal Skeleton Formation 
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© Springer Science+Business Media New York 1989

Authors and Affiliations

  • Yeishin Isa
    • 1
  1. 1.Department of BiologyUniversity of the RyukyusNishihara, OkinawaJapan

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