The coccolithophore Pleurochrysis Carterae.
The coccoliths are composed of an oval organic base plate (*) with a distal rim of interlocking calcite crystals (arrow head).
Marsh ME, Chang DK, King, GC (1992) "Isolation and characterization of a novel acidic polysaccharide containing tartrate and glyoxylate residues from the mineralized scales of a unicellular coccolithophorid alga Pleurochrysis carterae." J. Biol. Chem. 267: 20507-20512.
Marsh ME (1994) "Polyanion-mediated mineralization – assembly and reorganization of acidic polysaccharides in the Golgi system of a coccolithophorid alga during mineral deposition." Protoplasma 177: 108-122.
Marsh ME, Dickinson DP (1997) "Polyanion-mediated mineralization — mineralization in coccolithophore (Pleurochrysis carterae) variants which do not express PS2, the most abundant and acidic mineral-associated polyanion in wild-type cells." Protoplasma 199: 9-17.
Marsh ME (1999) "Coccolith crystals of Pleurochrysis carterae: crystallographic faces, organization, and development." Protoplasma 207: 54-66.
Marsh ME (2000) "Polyanions in the CaCO3 mineralization of coccolithophores." In: Biomineralization: from Biology to Biotechnology and Medical Applications. E. Baeuerline, ed. Wiley-VCH, Weinheim, pp. 251-268.
Marsh ME, Ridall AL, Azadi P, Duke PJ (2002) "Galacturonomannon and Golgi-derived membrane linked to growth and shaping of biogenic calcite." J. Struct. Biol. 139: 39-45.
Marsh ME (2003) "Regulation of CaCO3 formation in coccolithophores." Comp. Biochem. Physiol. B in press.