Tata

snRNA

small (5S) rRNA gene

Transcription start site small (5S) rRNA gene

Internal promoter

Box A

Box C

Transcription start site

Ju_L

Boxes represent specific sequences recognized by transcription factors.

rRNA

tRNA gene

Internal promoter

Box A

Box B

tRNA gene tRNA

tRNA

Conclusion: Promoters for RNA polymerase III vary in their sequences and positions relative to the gene.

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