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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

1l68

Tolerance of t4 lysozyme to multiple xaa (right arrow) ala substitutions: a polyalanine alpha-helix containing ten consecutive alanines