Related Experiment Video
Updated: Aug 9, 2026

Transient Gene Expression in Tobacco using Gibson Assembly and the Gene Gun
Published on: April 18, 2014
Transcriptional origin of Euglena chloroplast tRNAs
S D Schwartzbach1, L I Hecker, W E Barnett
1Biology Division, Oak Ridge National Laboratory, Oak Ridge, Tennessee 37830.
Abstract:
tRNA.DNA hybridization studies indicate that Euglena chloroplast tRNAs are transcriptional products of the chloroplast genome, which contains approximately 26 tRNA cistrons. Hybridization with purified chloroplast tRNA(Phe) and tRNA(Asp) shows that the chloroplast genome contains one cistron for each of these two species. No hybridization of chloroplast tRNA with nuclear DNA was observed. tRNAs from Euglena cytoplasm, Escherichia coli, and Agmenellum quadraduplicatum do not compete with chloroplast tRNA for hybridization with chloroplast DNA. Evidence is presented that photoinduction of chloroplast tRNAs is at the level of transcription rather than maturation of tRNA precursor molecules.
Related Concept Videos
Eukaryotic Evolution
Contrary to the endosymbiont theory, the eukaryote-first hypothesis proposes that the simpler prokaryotic and...
Diversity of Protists I
Export of Mitochondrial and Chloroplast Genes
The Anatomy of Chloroplasts
Structure of Chloroplasts
A...
Transcription in Prokaryotes
Protein Transport to the Stroma
Protein complexes called the translocon of the outer chloroplast membrane or TOC complex, and the translocon of the inner chloroplast membrane or TIC complex mediate the...

