4-(gamma-L-glutamylamino)butanoate + H2O <=> 4-aminobutanoate + L-glutamate
4-(gamma-l-glutamylamino)butanoate + h2o <=> 4-aminobutanoate + l-glutamate
4-(gamma-L-glutamylamino)butanoate + H2O <=> 4-aminobutanoate + L-glutamate
4-(gamma-l-glutamylamino)butanoate + h2o <=> 4-aminobutanoate + l-glutamate