.... Users of such resources should take this into consideration. gene annotation gene expression regulation RNA modification RNA–protein binding RNA–RNA binding snoRNAs Small nucleolar RNAs (snoRNAs) are an ancient and large family of noncoding RNAs present in all eukaryotes...

... that DNA genomes have over RNA genomes. We propose that a hypothetical RNA modification, a RRAR (ribose reductase acting on genomic dsRNA) produced the first stretches of DNA in RNA genomes. We discuss why this is the most satisfactory explanation for the origin of DNA. The evolution of this RNA...

... ). 4 9 2009 © The Authors Journal compilation © 2010 Biochemical Society 2010 Arabidopsis thaliana assembly factor Cajal body RNA modification small nucleolar RNA (snoRNA) Recent genetic and biochemical studies in yeast and animals have revealed that assembly of C/D and H...