Anhydrous calcium phosphate crystals stabilize DNA for dry storage
Philipp L. Antkowiak, Julian Koch, Przemysław Rzepka, Bichlien H. Nguyen, Karin Strauß, Wendelin J. Stark, Robert N. Grass
Abstract
The resilience of ancient DNA (aDNA) in bone gives rise to the preservation of synthetic DNA with bioinorganic materials such as calcium phosphate (CaP). Accelerated aging experiments at elevated temperature and humidity displayed a positive effect of co-precipitated, crystalline dicalcium phosphate on the stability of synthetic DNA in contrast to amorphous CaP. Quantitative PXRD in combination with SEM and EDX measurements revealed distinct CaP phase transformations of calcium phosphate dihydrate (brushite) to anhydrous dicalcium phosphate (monetite) influencing DNA stability.
Topics & Concepts
AnhydrousCalciumPhosphateChemistryDNAChemical engineeringCrystallographyMaterials scienceInorganic chemistryOrganic chemistryBiochemistryEngineeringAdvanced biosensing and bioanalysis techniquesDNA and Nucleic Acid ChemistryBiopolymer Synthesis and Applications