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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

4s1x

Crystal structure of ha2-del-l2sem, central coiled-coil from influenza hemagglutinin ha2 without heptad repeat stutter