A method for trapping nucleic acids on a surface of a solid phase substrate, which comprises the step of contacting a sample containing nucleic acids and having a pH of 12 or higher with the surface of the solid phase substrate on which divalent metal ions are immobilized, and a method for trapping nucleic acids on a surface of a solid phase substrate, which comprises the step of contacting a sample containing nucleic acids and a magnesium compound, of which pH is adjusted to be 12 or higher, with the surface of the solid phase substrate.

 
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< Polypeptide having activity of unsaturating W3-fatty acid, polynucleotide coding for the polypeptide and use thereof

> .alpha.(1,6)-linked glucose oligosaccharide hydrolyzing enzyme polynucleotides and polypeptides and methods of use thereof

> Electrochemical method to measure DNA attachment to an electrode surface in the presence of molecular oxygen
~ 00558