Abstract
The mutation and growth of Bacteriophage T4 Lysozyme (T4L) is easily accomplished in an undergraduate biochemistry laboratory and allows students to visualize how mutations affect enzyme stability and kinetics. However, full Michaelis-Menten parameters have been difficult to observe due to lack of a readily available, small molecule substrate. A FITC-tagged peptidoglycan has been used previously, but it is not commercially available and its preparation method was not appropriate for the undergraduate laboratory. Here, we describe a cost-effective, non-toxic, and reproducible means of generating FITC-tagged peptidoglycan fragments. Fluorescence assays monitoring substrate digestion using HEWL and T4L produced signals sufficient for reliable analysis of lysozyme kinetics.
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