GCA_000013225.1 CYB_1031 definition phosphoribosylaminoimidazole carboxylase, catalytic subunit GCA_000013225.1 CYB_1214 definition phosphoribosylaminoimidazole carboxylase ATPase subunit GCA_000013225.1 CYB_1784 definition phosphoribosylaminoimidazole-succinocarboxamide synthase GCA_000013225.1 CYB_1964 definition phosphoribosylformimino-5-aminoimidazole carboxamide ribotide isomerase