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Hoffmann, R. A wiki for the life sciences where authorship matters. Nature Genetics (2008)

DNA sequencing by capillary electrophoresis using copolymers of acrylamide and N,N-dimethylacrylamide.

Copolymers of acrylamide (AM) and N,N-dimethylacrylamide (DMA) with AM to DMA molar ratios of 3:1, 2:1 and 1:1 and molecular weights of about 2.2 MDa were synthesized. The polymers were tested as separation media in DNA sequencing analysis by capillary electrophoresis (CE). The dynamic coating ability of polydimethylacrylamide (PDMA) and the hydrophilicity of polyacrylamide (PAM) have been successfully combined in these random copolymers. A separation efficiency of over 10 million theoretical plates per meter has been reached by using the bare capillaries without the additional polymer coating step. Under optimized separation conditions for longer read length DNA sequencing, the separation ability of the copolymers decreased with decreasing AM to DMA molar ratio from 3:1, 2:1 and 1:1. In comparison with PAM, the copolymer with a 3:1 AM:DMA ratio showed a higher separation efficiency. By using a 2.5% w/v copolymer with 3:1 AM:DMA ratio, one base resolution of 0.55 up to 699 bases and 0.30 up to 963 bases have been achieved in about 80 min at ambient temperatures.[1]


  1. DNA sequencing by capillary electrophoresis using copolymers of acrylamide and N,N-dimethylacrylamide. Song, L., Liang, D., Kielescawa, J., Liang, J., Tjoe, E., Fang, D., Chu, B. Electrophoresis (2001) [Pubmed]
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