Chapter 15, Problem 13P

For each of the following mutant E. coli strains, plot a 30-minute time course of concentration of β-galactosidase, permease, and acetylase enzymes grown under the following conditions: For the first 10 minutes, no lactose is present; at 10ˊ lactose becomes the sole carbon source. Plot concentration on the y-axis, time on the x-axis. (Don’t worry about the exact units for each protein on the y-axis.)

a.	I-P+o+Z+Y+A+/ I+P+o+Z-Y+A+
b.	I-P+ocZ+Y+A+/ I+P+o+Z-Y+A+
c.	IsP+o+Z+Y+A+/ I-P+o+Z-Y+A+
d.	I-P-o+Z+Y+A+/ I-P+ocZ+Y-A+
e.	I-P+o+Z-Y+A+/ I-P-ocZ+Y-A+