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FASTA Sequence PDB Format mmCIF Format
FASTA Sequence PDB Format PDB Format(gz) PDBx/mmCIF Format PDBx/mmCIF Format(gz) PDBML/XML Format Validation Full PDF Validation CIF

6utw

E. coli sigma-s transcription initiation complex with a 4-nt rna ("fresh" crystal)

3D- Structure doesn't exist.