| ID | Description | N° of binding sites | Bound to chains |
|---|---|---|---|
| 2 | [[[(2~{r} + 3~{S} + 4~{r} + 5~{r})-5-(6-aminopurin-9-yl)-3 + 4-bis(oxidanyl)oxolan-2-yl]methoxy-oxidanyl-phosphoryl]oxy-sulfanyl-phosphoryl] [(2~{r} + 3~{r} + 4~{r} + 5~{r})-5-(2-azanyl-7-methyl-6-oxidanyl-purin-7-ium-9-yl)-4-methoxy-3-oxidanyl-oxolan-2-yl]methyl hydrogen phosphate | 2 (2 molecules) | A, B |