KEGG Orthology (KO) [BR:hsa00001] 09100 Metabolism 09102 Energy metabolism 00910 Nitrogen metabolism [PATH:hsa00910] 759 CA1; carbonic anhydrase 1 K01672 CA; carbonic anhydrase [EC:4.2.1.1] Enzymes [BR:hsa01000] 4. Lyases 4.2 Carbon-oxygen lyases 4.2.1 Hydro-lyases 4.2.1.1 carbonic anhydrase 759 CA1; carbonic anhydrase 1 K01672 CA; carbonic anhydrase [EC:4.2.1.1]