Haemocyanins are copper-containing oxygen transport proteins found in the haemolymph of many invertebrates .
Per a 3 and Bla g 3 American and German cockroach belong to this family .
Family-defining Pfam domains (at least one of these domains is present in each family member):
|Pfam domain||Pfam clan|
|PF00372||Hemocyanin, copper containing domain||CL0205||Di-copper centre-containing domain|
|PF03722||Hemocyanin, all-alpha domain||-|
|PF03723||Hemocyanin, ig-like domain||-|
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