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  • Title: Elastic properties of a single-stranded charged homopolymeric ribonucleotide.
    Author: Seol Y, Skinner GM, Visscher K.
    Journal: Phys Rev Lett; 2004 Sep 10; 93(11):118102. PubMed ID: 15447383.
    Abstract:
    We have investigated the elastic properties of poly(U), homopolymeric single-stranded RNA molecules that lack any base pairing and stacking interactions and conform to a random-coil structure. Using single-molecule stretching experiments we show that the elastic properties are described by a wormlike chain model for polymer elasticity rather than by a freely jointed chain model as is commonly used for single-stranded DNA. At low [Na+], introduction of a scale-dependent persistence length is required to account for electrostatic contributions.
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