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Effect of non‐complementary nucleotides on the rate of helix formation: Kinetics of formation of poly (I)·poly (C,I) and poly (I)·poly (C,U) complexes
Author(s) -
Kallenbach Neville R.,
Drost Stanley D.
Publication year - 1972
Publication title -
biopolymers
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.556
H-Index - 125
eISSN - 1097-0282
pISSN - 0006-3525
DOI - 10.1002/bip.1972.360110808
Subject(s) - polynucleotide , chemistry , kinetics , helix (gastropod) , reaction rate constant , nucleotide , polymer chemistry , copolymer , kinetic energy , stereochemistry , crystallography , polymer , organic chemistry , biochemistry , ecology , physics , quantum mechanics , snail , gene , biology
Apparent second‐order rate constants for complex formation between poly (I) and poly (C) and copolymers of C containing non‐complementary I or U residues have been determined spectrophotometrically. The rate constants decrease as the concentration of either I or U in the C strands increases–the effect seems insensitive to the species of residue involved, when differences in the thermal stabilities of the poly (I) poly (C,I) and poly (I). poly (C,U) complexes are taken into account. These results suggest that low concentrations of relatively stable defects can alter the apparent kinetic “complexity” of polynucleotides as determined by hybridization methods ( C 0 t analysis).