David Allis and colleagues discovered an enzyme in this model organism that was homologous to theyeast protein Gcn5, thus giving the first direct evidence that histone modification of chromatin is amechanism of transcriptional activation. The crystal structure of the P4-P6 domain of a group I intron inthis organism provided information about the structure of the tight turn, adenosine platform, and tetraloopreceptor; that intron was the first known RNA molecule with catal
David Allis and colleagues discovered an enzyme in this model organism that was homologous to theyeast protein Gcn5, thus giving the first direct evidence that histone modification of chromatin is amechanism of transcriptional activation. The crystal structure of the P4-P6 domain of a group I intron inthis organism provided information about the structure of the tight turn, adenosine platform, and tetraloopreceptor; that intron was the first known RNA molecule with catalytic activity. Like other members of itsphylum, this model organism contains a somatic genome in its macronucleus and a germline genome in itsmicronucleus. An enzyme first isolated in this organism adds repeats of the sequence TTGGGG to the endof chromosomes. Carol Greider and Elizabeth Blackburn discovered that enzyme, which is telomerase. For10 points, identify this genus of ciliate protozoa that includes the species pyriformis and thermophila.
David Allis and colleagues discovered an enzyme in this model organism that was homologous to theyeast protein Gcn5, thus giving the first direct evidence that histone modification of chromatin is amechanism of transcriptional activation.
Tetrahymena [or Tetrahymena thermophila; or Tetrahymena pyriformis]