polynucleotide (pol-e-nu´kle-o-tId)

A linear polymer containing an indefinite (usually large) number of nucleotides, linked from one ribose (or deoxyribose) to another via phosphoric residues. Cf. oligonucleotide.
p. methyltransferases enzymes that catalyze the methylation of purine and/or pyrimidine bases of p.'s, or of the sugars of p.'s.polynucleotide methylases;
p. phosphorylase polyribonucleotide nucleotidyltransferase
p. thioltransferases enzymes that catalyze specific thiolation reaction of purine and/or pyrimidine bases in p.'s.


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