1.9.3.1 cytochrome-c oxidase transferred to EC 7.1.1.9 1.9.98.1 iron-cytochrome-c reductase - 1.9.99.1 iron-cytochrome-c reductase transferred to EC 1.9.98.1 1.9.6.1 nitrate reductase (cytochrome) - 1.9.3.2 Pseudomonas cytochrome oxidase transferred to EC 1.7.2.1