Arginine 54 in the active site of escherichia coli aspartate transcarbamoylase is critical for catalysis: A site-specific mutagenesis, NMR, and X-ray crystallographic study

Arginine 54 in the active site of escherichia coli aspartate transcarbamoylase is critical for catalysis: A site-specific mutagenesis, NMR, and X-ray crystallographic study