MeSH note : An unusual amino acid residue found at active site of sulfatases. It is created through
the conversion of an active site cysteine or serine residue by C(alpha)-formylglycine
(FGly)-generating enzyme. Although the term formylglycine has been used in the literature
to refer to C(alpha)-formylglycine it is found in most chemical sources as a synonom
for N-formyglycine.;