Given the Accompanying Table Where Numbers 1 Through 4 Indicate Four Supplements That Must

Essay

Given the accompanying table: $$\begin{array}{l}\begin{array} { ll r } &1&2&3&4\\\hline Strain A&+&-&+&- \\Strain B&+&+&+&- \\Strain C&+&+&+&+ \\Strain D&-&-&+&- \\\end{array}\end{array}$$ Where numbers 1 through 4 indicate four supplements that must be added to sustain growth of the organism. Determine a possible metabolic pathway that would give the results seen for the four mutant strains, A through D.