Abstract:
In the protozoan parasite, Babesia bovis, the glutamine-dependent carbamoyl phosphate synthetase-encoding gene (CPSII) contains contiguous amidotransferase- and synthetase-encoding sequences. Unlike the organisation in most eukaryotes, the gene is not fused with other genes encoding enzymes of pyrimidine biosynthesis de novo. The nucleotide sequences immediately upstream and downstream from the gene contain motifs which may be involved in regulating its expression.