1.    Below is a table that presents the effect of different...

1.    Below is a table that presents the effect of different media on the growth response of tryptophan mutations in Salmonella typhimurium (+ = growth, - = no growth). 

 

                                                                              Medium Supplemented with

            Strain                    No Supplement           IGP     AA       IN     TRY

trp-8                                       -                     +         +         +         +

trp-2                                       -                     +         -         +         +

trp-3                                       -                     -         -         +         +

trp-1                                       -                     -         -         -         +

 

a)    Construct the biochemical pathway for the compounds IGP, AA, IN, and TRY based on these data.

 

b)    Place strains of bacteria (mutations) in the appropriate steps in the above pathway.