Concentration gradient used in double-stranded DNA separation by capillary electrophoresis |
| |
Authors: | Liang Dehai Chu Benjamin |
| |
Institution: | Department of Chemistry, State University of New York at Stony Brook, Stony Brook, NY 11794-3400, USA. |
| |
Abstract: | Effects of concentration gradient on double-stranded DNA (dsDNA) separation by capillary electrophoresis are presented. By using a concentration gradient in the range between 0.8% and 3.2% for poly(N,N-dimethylacrylamide) (PDMA), the presence of a mesh-size gradient in the capillary could enhance the separation of larger size DNA fragments, better than that based on a single uniform concentration over the same capillary length. A decrease in the column length could make the gradient effect more obvious. An optimal capillary length could be achieved by using a judicious combination of the concentration gradient and the concentration range, yielding a maximum resolution for the system. The standard deviation of the migration time measured for each DNA fragment was less than 5% in ten continuous runs, suggesting that the gradient formed inside the column was quite stable. |
| |
Keywords: | |
本文献已被 PubMed 等数据库收录! |
|