Abstract
The three cistrons of the Escherichia coli gal operon are normally expressed co-ordinately. When the operon is transcribed from a prophage λ promoter, however, the expression is disco-ordinate. The product of the first cistron, galE, is found in much lower amounts than the products of the second and third cistrons, galT and galK. We find that the transcription of the operon under phage control is roughly co-ordinate, and conclude that the messenger RNA encoding galE is translated abnormally.
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