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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

1htl

Mutation of a buried residue causes lack of activity but no conformational change: crystal structure of e. coli heat-labile enterotoxin mutant val 97--> lys