Phototriggering of Caged Fluorescent Oligodeoxynucleotides
摘要:
We describe a synthetic route for incorporating a photocleavable (PC) DABSYL moiety and fluorescein at adjacent cytidines in the middle of a 25-mer oligodeoxynucleotide. In hybridization studies, both fluorescein and the photocleavable DABSYL reduced the T-m about 6 degreesC separately. UV irradiation (355 nm, 2 min) removed the PC-DABSYL moiety, which increased the fluorescence intensity 51-fold and restored the melting temperature. Caged fluorescent oligodeoxynucleotides (CFOs) will allow many DNA processes to be controlled with light.
SYNTHESES OF DNA DUPLEXES CONTAINING A C‒C INTERSTRAND CROSS-LINK
作者:Anne M. Noronha、David M. Noll、Paul S. Miller
DOI:10.1081/ncn-100002542
日期:2001.3.31
Short DNAduplexes that contain a N4C-ethyl-N4C interstrand cross-link were prepared on controlled pore glass supports using a DNA synthesizer. The C-C cross-link was introduced via a convertible nucleoside on the support or by using a protected C-C cross-link phosphoramidite. An orthogonal protection scheme allowed selective chain growth in either a 3'-->5' or 5'-->3' direction. The cross-linked duplexes