Abstract
Significant alterations in thermal stability of parallel DNA triplexes and antiparallel duplexes were observed upon changing the attachment of ethynylpyrenes from para to ortho in the structure of phenylmethylglycerol inserted as a bulge into DNA (TINA). Insertions of two ortho-TINAs as a pseudo-pair in the middle of the duplex resulted in formation of an excimer band at 505 nm for both 1- and 4-ethynylpyrene analogues.
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