the genes specifying the synthesis of gamma-aminobutyrate permease , gabp , gamma-aminobutyrate transaminase , gabt , and succinic semialdehyde dehydrogenase , gabd , and the control gene , gabc , that coordinately regulates their expression all form a cluster on the e. coli chromosome , linked to the srl and reca loci ( at 57.5 min ) .
C0008633
chromosome
C1708726
loci