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Selection of Crystal Face of Calcium Oxalate Monohydrate Beneath Dppc Monolayers in the Presence of Chondroitin Sulfate A

The crystal face selection of calcium oxalate monohydrate (COM) at dipalmitoylphosphatidylcholine (DPPC) monolayers was investigated in the presence of chondroitin sulfate A (C4S). The (1‾01) face was doubly strengthened and the (010) face was doubly weakened in the presence of C4S at DPPC monolayers. This was due to the simultaneous interaction of the Ca2+-rich (1‾01) crystal face of COM with both the polyanionic polysaccharide C4S and the negatively charged sites of phosphate groups of the DPPC monolayers.