since the enzyme does not form 4-aminobutyrate from synthetic or enzymatically formed 4-aminobutyryl coa , we conclude that a 4-aminobutyryl coa-enzyme complex is the actual precursor of 4-aminobutyrate , whereas free 4-aminobutyryl coa is the precursor of pyrrolidinone .
C0014442
enzyme
C0026741
enzyme complex