however , an operon sequence that occurs 5 ' to t1 within the coding region of the rpsu gene and which has homology with the lambda nut site , ( lupski et al . 1983 ) when placed 5 ' to t1 in the pdr720 plasmid construct , modifies transcription through t1 allowing expression of the galk gene .
C0040649
transcription
C0017262
expression