6533b829fe1ef96bd1289afb

RESEARCH PRODUCT

Single nanogranules preserve intracrystalline amorphicity in biominerals.

Joe HarrisFrédéric MarinStephan E. WolfCorinna F. BöhmMyriam HajirMihail Mondeshki

subject

0301 basic medicineMaterials scienceMechanical EngineeringMineralogy02 engineering and technology[ SDV.IB.BIO ] Life Sciences [q-bio]/Bioengineering/Biomaterials021001 nanoscience & nanotechnologyAmorphous calcium carbonate[SDV.IB.BIO] Life Sciences [q-bio]/Bioengineering/Biomaterials03 medical and health scienceschemistry.chemical_compound030104 developmental biologyCalcium carbonatechemistryMechanics of MaterialsBiophysicsGeneral Materials ScienceOrganic matrix0210 nano-technologyMesocrystalCalcareousComputingMilieux_MISCELLANEOUSBiomineralization

description

We revisit the ultrastructural features of different calcareous biominerals and identify remarkable similarities: taxonomically very distant species show a common nanogranular structure, even if different extracellular secretion patterns are employed or calcium carbonate polymorphs formed. By these analyses, we elucidate the locus of the small fraction of intracrystalline organic matrix revealing its intergranular character and localize the intracrystalline amorphous calcium carbonate moiety commonly found in mesocrystalline biominerals and provide a first explanation for the pathway by which it is preserved.

https://hal.science/hal-01194512