SEARCH Articles Figures Tables Acetylcholinesterase serine residue Active serine residue Active-site serine residue Amino-acid residues serine Cholinesterases serine residue Nucleophilic serine residue Periodate Oxidation of N-Terminal Serine or Threonine Residues Serine proteases residue Serine proteases, catalytic residues Serine residue acetylcholinesterase active site Serine residue organophosphate binding Serine residues alkaline phosphatase Serine residues bacterial Serine residues chemical modification Serine residues chymotrypsin Serine residues cytochrome Serine residues mammalian Serine residues modification Serine residues ribonuclease Serine-14 residue, phosphorylation