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Abstract: The selection of a DNA extraction method is a critical step when subsequentanalysis depends on the DNA quality and quantity. Unlike mammals, for which severalcapable DNA extraction methods have been developed, for molluscs the availability ofoptimized genomic DNA extraction protocols is clearly insufficient. Several aspects suchas animal physiology, the type (e.g., adductor muscle or gills) or quantity of tissue, canexplain the lack of efficiency (quality and yield) in molluscs genomic DNA extractionprocedure. In an attempt to overcome these aspects, this work describes an efficientmethod for molluscs genomic DNA extraction that was tested in several species fromdifferent orders: Veneridae, Ostreidae, Anomiidae, Cardiidae (Bivalvia) and Muricidae(Gastropoda), with different weight sample tissues. The isolated DNA was of highmolecular weight with high yield and purity, even with reduced quantities of tissue.Moreover, the genomic DNA isolated, demonstrated to be suitable for several downstreammolecular techniques, such as PCR sequencing among others.
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