4-aminobutanoate + acetate => 4-acetamidobutanoate + H2O
4-aminobutanoate + acetate => 4-acetamidobutanoate + h2o
4-aminobutanoate + acetate => 4-acetamidobutanoate + H2O
4-aminobutanoate + acetate => 4-acetamidobutanoate + h2o