The Arabidopsis thaliana genome comprises around 1,000 copies of 5S rRNA genes encoding both major and minor 5S rRNAs. In mature wild-type leaves, the minor 5S rRNA genes are silent. Using different mutants of DNA methyltransferases (met1, cmt3 and met1 cmt3), components of the RNAi pathway (ago4) or post-translational histone modifier (hda6/sil1), we show that the corresponding proteins are ne...

The maturation of 5S RNA in Escherichia coli is poorly understood. Although it is known that large precursors of 5S RNA accumulate in mutant cells lacking the endoribonuclease-RNase E, almost nothing is known about how the mature 5' and 3' termini of these molecules are generated. We have examined 5S RNA maturation in wild-type and single- or multiple-exoribonuclease-deficient cells by Northern...

A color-digit interference task and two sorting tasks were devised as variants of the Stroop Color-Word Test and Gardner's Sorting Tasks, respectively. These tasks proved applicable to a mentally retarded sample and provided reliable measures of two cognitive control dimensions (constricted-flexible control and equivalence range). As predicted, the main test scores were significantly more varia...

The analysis presented in 1972 by R. F. Q. Johnson, B. A. Maher, and T. X. Barber indicated that nonhypnotic 5s manifest trance logic as often as "real" hypnotic 5s. E. R. Hilgard's 1972 critique contended that the analysis was misleading because only those 5s should have been included in the analysis who met the stringent criterion for hallucination. This paper shows that when one includes in ...

5S rRNA is an integral component of the large ribosomal subunit in virtually all living organisms. Polyamine binding to 5S rRNA was investigated by cross-linking of N1-azidobenzamidino (ABA)-spermine to naked 5S rRNA or 50S ribosomal subunits and whole ribosomes from Escherichia coli cells. ABA-spermine cross-linking sites were kinetically measured and their positions in 5S rRNA were localized ...

In Phase I of the investigation, 70 5s were assigned to one of three treatment conditions: hypnotic induction, instructions to simulate hypnosis, or imagination control. All 5s were assessed on Orne's two indexes of trance logic (the transparent hallucination and the double hallucination). The imagination controls consistently showed trance logic as often as the hypnotic Ss. Depending upon the ...

In Escherichia coli, ribosomal RNAs (16S, 23S and 5S) are co-transcribed in a highly regulated manner from seven genomically dispersed operons. Previous studies on the cellular effects of altered levels of two of these rRNAs (16S and 23S) have been useful in better understanding the regulation of rRNA expression. Furthering these studies, we have investigated the effect of 5S rRNA deficiencies ...