Abstract
A novel method for immobilizing large DNA fragments on a solid surface was developed. A mixed self-assembled monolayer of thiolated single-stranded DNA with inert alkanethiol was generated on a gold (Au) surface through the Au–S reaction. Surface-tethered DNA generated by this method was compatible with various genetic engineering techniques, including hybridization, polymerization, restriction enzyme digestion and ligation. Kinetic control of surface coverage of immobilized DNA was critical for optimizing genetic engineering techniques on solid-phase. Multi-step reaction schemes utilizing various genetic engineering techniques described above were employed for solid-phase gene assembly. We were able to immobilize DNA fragments of up to 1180 bp on a solid surface. Furthermore, we showed that these immobilized genes can be regenerated by PCR. The present work suggests that these types of assembled genes can be used to store and regenerate genes on solid-phase.
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