Summarized by In-Hee Lee Characterization of Non-Crosshybridizing DNA Oligonucleotides Manufactured In Vitro J. Chen, R. Deaton, M. Garzon, J. W. Kim, D. Wood, H. Bi, D. Carpenter, Y.-Z. Wang DNA10, pp. 132-141 2004. 6. 29. MEC Seminar Summarized by In-Hee Lee
Introduction In vitro protocol for generating non-crosshybridizing DNA oligonucleotides. Refer to DNA8 proceedings.
Introduction Advantages The oligonucleotides are selected in the conditions under which computations will be done. The potential for very large libraries. Prove the non-crosshybridizing characteristics of the library experimentally.
Cloning and Sequencing of Library Oligonucleotides Cycle # % Start 2(2) 20(20) 1 8(3) 22(8.3) 2 12(4) 33(11) 3 5(3) 23.8(14.3) 4 6(3) 28.6(14.3) Decrease in the # of stable crosshybridization(?)
Library Characterization with Gels Its intensity means the number of extended products. The intensity increase with cycle. More product is amplified over the cycle.
Library Characterization with Gels No self-hybridization in top and bottom strands.
Library Characterization with Spectroscopy Melting curve investigation Protocol product Random DNA samples of length 20. As a starting population of the protocol. 40 non-crosshybridizing oligonucleotides of length 20 [Deaton at al., 2003] Single-stranded oligonucleotide of length 20. 3 & 4 as a standard for non-crosshybridization. Watson-Crick pair of 2 sequences from 3. As a standard for hybridization.
Random seq. Top strands from cycle 4. NCH sequences Top and bottom strands from cycle 4. WC complements
Conclusion The experimental result indicate that the protocol was selecting for populations of non-crosshybridizing sequences.