passages.id: split_8_test_1129_passage
passages.type: progene_text
passages.text: Most of the arg genes were found to be clustered in one continuous sequence divergently transcribed in two wings , argE and argCBFGH ( A ) ["H(A) " indicates that the argininosuccinase gene consists of a part homologous to known argH sequences and of a 3' extension able to complement an Escherichia coli mutant deficient in the argA gene , encoding N-alpha-acetylglutamate synthetase , the first enzyme committed to the pathway ] .