Fig 5. Salts enhance DNA binding to cellulose-based paper.

(A) The zeta potential of Whatman No.1 (black triangles) and Hybond N (open circles) was measured across a range of pHs. (B) Whatman No.1 discs were incubated in purified Arabidopsis genomic DNA (1 ng/μl) dissolved in water or in 150 mM NaCl. DNA solution was removed from discs by spinning, and the discs were added to a PCR amplification. The band intensities achieved with cellulose discs relative to the 60 minute sample in water appear below each band.