Enrichment of beads bound to single molecules of hydrogenase DNA.

<p>Beads displaying CAT DNA and beads displaying CpI DNA were originally mixed in a 20∶1 ratio. Comparison of the PCR amplification products from nonfluorescent (−) and fluorescent (+) sorted beads by agarose gel electrophoresis indicates that the more fluorescent population is enriched in CpI-bound beads. Nonspecific amplification products are visible in both lanes.