A protein containing copper, responsible for transporting oxygen in the blood plasma of arthropods and mollusks.
- It is intriguing that crustaceans seem to express either hemoglobin or hemocyanin but not both proteins.
- One grasshopper embryo has a protein that closely resembles hemocyanin in sequence, but no oxygen binding studies to confirm its function have yet been done.
- The ontogeny of crustacean hemocyanin, the copper-based oxygen transport protein, has been studied in relatively few species, including Nephrops norvegicus and Homarus americanus.
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