Aspartate transcarbamoylase coordinates the rates of synthesis of purine and pyrimidine nucleotides through binding to ATP, CTP, aspartate, and carbamoyl phosphate, all of which directly regulate its enzymatic activity. Based on knowledge of metabolite regulatory mechanisms, the overall flow of nucleotide metabolism, and the balance of purine and pyrimidine concentrations, hypothesize how binding to each of these molecules will impact its catalytic function.?