title: Base composition studies on transfer RNA from normal and regenerating rat liver.
abstract: The base composition of bulk tRNA isolated from regenerating rat liver, 12, 18, 24 and 30 h after partial hepatectomy, was determined by a 3H derivative method. Only a few minor statistically significant changes (2--11%), as compared to sham-operated liver, were found at 18, 24 and 30 h after hepatectomy. These included a reduction in the amounts of adenosine and 3-(3-amino-3-carboxypropyl)-uridine, and an increase in the amounts of 1-methyl-adenosine, 1-methylguanosine, 3-methylcytidine and pseudouridine. Similarly, when the base composition of tRNA fractions from control and 24-h regenerating rat liver, partially purified by one-dimensional polyacrylamide gel electrophoresis, was determined, no gross differences were observed. These results suggest that the process of liver regeneration is not accompanied by a gross alteration of the modification pattern of tRNA.
mesh_terms: D000818:Animals; D008099:Liver / Q000378:metabolism*; D008115:Liver Regeneration; D008297:Male; D012343:RNA, Transfer / Q000378:metabolism; D051381:Rats; D012263:Ribonucleosides / Q000378:metabolism; D013997:Time Factors; D012359:tRNA Methyltransferases / Q000378:metabolism
chemical_list: D012263:Ribonucleosides; D012343:RNA, Transfer; D012359:tRNA Methyltransferases