| Literature DB >> 6176270 |
J F Thompson, J P Bachellerie, K Hall, J E Hearst.
Abstract
The photoaddition of 4'-(hydroxymethyl)-4,5',8-trimethylpsoralen (HMT) to different conformational states of RNA was studied. Poly(U), poly(A,U) (random copolymer), poly(A-U) (alternating copolymer), poly(A) . poly(U) (double stranded), and poly(U) . poly(A) . poly(U) (triple stranded) were reacted with HMT at different temperatures and salt concentrations. The conformation of the polymers was monitored by UV absorption and circular dichroism. It was found that the rate of HMT photoaddition changed dramatically at structural transitions in the RNA. The alternating copolymer poly(A-U) was found to have the highest rate of addition. Low salt and temperature produced maximal incorporation.Entities:
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Year: 1982 PMID： 6176270 DOI： 10.1021/bi00535a040
Source DB: PubMed Journal: Biochemistry ISSN： 0006-2960 Impact factor: 3.162