| H-NOX | Heme-Nitric oxide and OXygen binding domain |
| Cs or Tt | Caldanaerobacter subterraneus or Thermoanaerobacter tengcongensis |
| Ns | Nostoc sp. |
| Ka | Kordia algicida |
| MD | molecular dynamics |
| sGC | soluble guanylate cyclase |
| NO | nitric oxide |
| CO | carbon monoxide |
| XO | CO or NO or O2 |
| RMSF | root mean square fluctuation |
| RMSD | root mean square deviation |
| P1SP | Proximal surface pocket 1 |
| P2SP | Proximal surface pocket 2 |
| BP1 | Buried pocket 1 |
| BP2 | Buried pocket 2 |
| BP3 | Buried pocket 3 |
| Xe2 | Xe-binding pocket 2 |
| Xe3 | Xe-binding pocket 3 |
| DSP | Distal surface pocket |
| SP | Surface pocket |
| OPC | Optimal point charge water model |