|  | C.elegans GLB-1 | C.elegans GLB-26 | H.sapiens NGB | Sperm whale Mb | A.suum Hb |
---|---|---|---|---|---|---|
O 2 | k on μM -1 s -1 | 23 | n.d. | 250 | 14 | 3 |
 | k off s -1 | 0.5 | n.d | 0.8 | 12 | 0.013 |
 | K = k on /k off μM -1 | 46 | n.d | 313 | 1.1 | 215 |
 | P 50 torr | 0.003 | n.d | 1 | 1 | 0.0072 |
His | k on s -1 | - | 20000 | - | - | - |
 | k off s -1 | - | 0.3 | - | - | - |
 | K = k on /k off | - | 66667 | - | - | - |
CO | k on μM -1 s -1 | - | 23 | 65 | 0.5 | 0.21 |
 | k off s -1 | - | 0.05 | 0.01 | 0.02 | 0.018 |
 | K = k on /k off μM -1 | - | 460 | 4643 | 28 | 12 |