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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

1acm

Arginine 54 in the active site of escherichia coli aspartate transcarbamoylase is critical for catalysis: a site-specific mutagenesis, nmr and x-ray crystallography study