Plant ribonucleic acids which have high adenosine monophosphate concentrations were studied. Purified deoxyribonucleic acid-like ribonucleic acid and tenaciously bound ribonucleic acid fractions both contained poly-adenosine monophosphate sequences (those from the latter being longer than those from the former); without these poly-adenosine monophosphate sequences their base compositions were t...

Sufficient quantities of various nuclear and nucleolar ribonucleic acid fractions were obtained by repeated density gradient sedimentations for analysis of base composition determined by optical density, as well as base composition determined by labeling with 32P-orthophosphate, reaction with formaldehyde, and chromatography on methylated serum albumin columns. The base compositions determined ...

During diabetes mellitus, total proteins and ribonucleic acids are significantly decreased in the rat heart, and these parameters can be increased by insulin administration. To determine whether all ribonucleic acids are equally sensitive to insulin, we examined the influence of this hormone on individual translatable ribonucleic acids. Cardiac ribonucleic acid prepared from control, untreated,...

Cohen (1948a) has reported that during the multiplication of the bacteriophages T2r+ and T4r+ in Escherichia coli, strain B, the ribonucleic acid content of the host remains constant. Similar observations were made by Kozloff et al. (1951) who investigated the origin of the nitrogen of T6r+ multiplying in the same host. Cohen (1948b) also examined the possibility that the ribonucleic acid was u...

OBJECTIVE To verify whether micro ribonucleic acid 34-a can exert its negative effects in human neuroblastoma cells. METHODS The study was conducted at The Affiliated Hospital of Qingdao University, Qingdao, Shandong, China during 15 months (from March 2015 to about June 2016). Quantitative reverse transcription polymerase chain reaction was used to find the differences of micro ribonucleic a...

The effects of protein deficiency on the metabolism of ribonucleic acid in the liver have already been described (Munro, Naismith & Wikramanayake, 1953; Clark, Naismith & Munro, 1957). The amount of ribonucleic acid in the liver falls rapidly during the first day of protein depletion and then becomes adjusted at a lower level. During the initial phase of reduction, uptake of 32p and of [14C]gly...

We describe the benefit of using reconstructed ancestral sequences (RAS) on resequencing microarrays for rapid pathogen identification, with Enterobacteriaceae rpoB sequences as a model. Our results demonstrate a sharp improvement of call rate and accuracy when using RASs as compared to extant sequences. This improvement was attributed to the lower sequence divergence of RASs, which also expand...

A number of additional purines and pyrimidines have recently been described as minor constituents of ribonucleic acids. Cohn (1957, 1958, 1959) and Davis & Allen (1957) have described an unusual pyrimidine nucleotide from yeast ribonucleic acid, thymine, 2-methyladenine, 6-methylaninopurine and 6-dimethylaminopurine have been identified as components ofribonucleic acid from several sources (Lit...

The polyadenylic acid-containing messenger ribonucleic acids of eukaryotic cells are rapidly isolated and deproteinized in a simple and gentle one-step procedure. The polyribosome fraction, dissolved in 0.5 M NaCl/0.5 percent sodium dodecyl sulfate, is passed through an oligo(dT)-cellulose column which is then washed with the solvent until proteins and contaminating ribonucleic acids are fully ...