. Control mechanisms in cellular processes. Cytology; Biochemistry. A6 >^ o t c O) to c o aj Ci c> X (U Oi â o c <u ^ ^ o t/) k. o CP ^ CONTROL MECHANISMS IN CELLULAR PROCESSES 100 c o o o c o en E O) E < I - I- +. 0 10 20 30 40 Time in minutes Fig. 2-6. Induction of /i-galactosidase following "thymine ; A mutant strain of 'EschencWyo co// that requires thymine (T), arginine (A), and uracil (U) was incubated in the presence of thymine, but in the absence of arginine and uracil, for the achievement of the thymine-saturated state. Argi- nine and uracil were added
. Control mechanisms in cellular processes. Cytology; Biochemistry. A6 >^ o t c O) to c o aj Ci c> X (U Oi â o c <u ^ ^ o t/) k. o CP ^ CONTROL MECHANISMS IN CELLULAR PROCESSES 100 c o o o c o en E O) E < I - I- +. 0 10 20 30 40 Time in minutes Fig. 2-6. Induction of /i-galactosidase following "thymine ; A mutant strain of 'EschencWyo co// that requires thymine (T), arginine (A), and uracil (U) was incubated in the presence of thymine, but in the absence of arginine and uracil, for the achievement of the thymine-saturated state. Argi- nine and uracil were added at zero time; inducer, methyl-thio-/i-D-galactoside (TMG), was added at the times indicated. Enzyme activity is presented in arbi- trary units. Upon addition of inducer at zero time, enzyme formation proceeds after a pronounced lag; a later addition (at 10 minutes) results in a shorter lag. If the inducer is supplied after a sufficiently long period of incubation, lag is. Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Bonner, David M; Society of General Physiologists; Suskind, Sigmund R. New York, Ronald Press
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