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An oxygen-carrying pigment in some mollusks, crustacea, and arthropods; contains copper rather than heme; used as an experimental antigen.
Synonym(s): haemocyanin.
[hemo- + G. kyanos, blue material, + -in]


a respiratory pigment found in the blood plasma of many molluscs and crustaceans that performs the same function Transverse section of an insect, showing the positions of the heart, haemocoel and blood flow.

as HAEMOGLOBIN in other animals. The metallic radicle of its PROSTHETIC GROUP, however, is copper rather than iron, giving the molecule a bluish colour.

References in periodicals archive ?
Morphology and ultrastructure of the left kidney (papillary sac) in Haliotis iris', possible role in reabsorption and haemocyanin synthesis or storage.
Modulation of haemocyanin oxygen affinity in the intertidal prawn Palaemon elegans (Rathke).
The researchers found that the forms of haemocyanin of the Antarctic octopod Pareledone charcoti, are genetically and functionally different from the temperate and warmer climate octopods, facilitating oxygen release at sub-zero temperatures.
Haemocyanin concentration of juvenile lobsters (Homarus gammarus) in relation to moulting cycle and feeding conditions.
An ergonovine-glutaryl-keyhole limpet haemocyanin (EG-KLH) conjugate was manufactured for the purpose of eliciting an immune response in Balb/C mice.
Moult cycle of the decapod Nephrops norvegicus (Linnaeus, 1758): description of stages and sequential changes in haemolymph protein and haemocyanin.
A structure of the copper-containing, oxygen-carrying protein Panulirus interruptus haemocyanin.
Molecular phylogeny and the geographic origin of Haliotidae traced by haemocyanin sequences.
The functioning of the haemocyanin of the terrestrial Christmas Island red crab Gecarcoidea natalis and roles for organic modulators.
An analysis of the effects of pH on oxygen binding by squid (Illex illecebrosus, Loligo pealei) haemocyanin.
Cu is the main component of haemocyanin, which functions as oxygen carrier and can often be found in high concentrations in gill and hepatopancreas tissue of crustaceans (Bryan 1968, Darmono & Denton 1990, Depledge et al.