Erythrocruorin
| Globin, extracellular | |
|---|---|
| Identifiers | |
| Symbol | Haemoglobin_extracell |
| InterPro | IPR014610 |
| Annelid erythrocruorin linker subunit, C-terminal | |||||||||
|---|---|---|---|---|---|---|---|---|---|
| Identifiers | |||||||||
| Symbol | Eryth_link_C | ||||||||
| Pfam | PF16915 | ||||||||
| InterPro | IPR031639 | ||||||||
| CATH | 2gtlM02 | ||||||||
| SCOP2 | 8029676 / SCOPe / SUPFAM | ||||||||
| CDD | cd11673 | ||||||||
| |||||||||
Erythrocruorin (from Greek eruthros "red" + Latin cruor "blood"), and the similar chlorocruorin (from Greek khlōros "green" + Latin cruor "blood"), are large oxygen-carrying hemeprotein complexes, which have a molecular mass greater than 3.5 million daltons. Both are sometimes called giant hemoglobin or hexagonal bilayer haemoglobin. They are found in many annelids and arthropods (including some insects).
Chlorocruorin is particularly found in certain marine polychaetes.