The protein L-isoaspartyl methyltransferase (PIMT) is well known for its protein repair function, namely the reconversion of deamidated and/or isomerized asparaginyl and aspartyl residues (L-isoaspartyl residues) into their normal, non-isomerized forms. The conversion of biomolecules to non-useful and potentially toxic products by unwanted chemical reactions represents probably an important aspect ...