Such a mechanism could be used to deal with many types of templates, independent of format (e.g., verbal, melodic, and motor), and thus would be available for multiple domains.
The detection of radiolabelled RNA comigrating with synthetic or endogenous transcripts present at high concentrations in the amphibian extracts raised the possibility that the RNA synthesis corresponded to the template independent labelling of primer-RNAs at their 3'-ends.
Initially, the first step in the template independent addition of G-1 catalyzed by Thg1 was compared to the adenylation reactions catalyzed by the tRNA synthetases that result in release of AMP [ 7].
Although Mn2+ is most likely not the divalent metal ion used for HP functions during viral replication, it is possible that Mn2+ could exert mutagenic effects on HBV genomic replication during long-term infection by activating the template independent transferase activity of HP.
The requirement for hybridization of the primers to the target sequence for activation prevents template independent reactions such as the formation of primer-dimers.
Therefore, these results confirm that the RNA synthesis is not due to a template independent terminal labelling at the 3'OH-end of the exogenous RNA.
In the case of the template-independent ligation of G-1 the reaction proceeds via an initial adenylation of the 5' phosphate by Thg1 resulting in a 5' App overhang [ 7].
PAPOLG is a poorly characterized gene that is likely to be a member of the poly(A) polymerase family, which catalyses template-independent extension of the 3′ end of a DNA/RNA strand (40).
In addition, reversion to a wild-type phenotype svt2 might be facilitated by a selection of vigorous embryos into maturity.The sequence changes in the vtc1-1 and svt2 suggests an origin of a 'template' independent of L er and Col alleles, and might also be sequences from another related ecotype.
Terminal deoxynucleotidyl transferase (TdT) catalyzes a template-independent addition of nucleotide triphosphates to the 3′-OH ends of double-stranded or single-stranded DNA.
The terminal deoxynucleotide transferase (TdT) catalyses a template-independent addition of 2′-deoxyribonucleotides to the 3′-OH group of various DNA and RNA substrates and efficiently incorporates the polymerisation terminator 2′,3′-didesoxyadenosine-5′-triphosphate (ddATP).
