purC PUR7_AQUAE 216 aq_2117 MKKVRKLYEGKAKIVYETDEKDKLILEFKDVATAFDGVKKEEIKGKGSLNNEISSLIFEILEDHGIKTHYIKKLSDREMLVWRAERFPVEVVVRNYAAGSFVKRYGVKEGTKLEQPLVEFFMKSDELHDPMVCINHIKVLKLAPAELVPEMEKIALKVNEILKKIFEEKGILLVDFKLEFGRLPSGELAIVDEISPDSMRLWDKSTGENWIKTDSV SAICAR synthetase Phosphoribosylaminoimidazole-succinocarboxamide synthase