Multiple Haemoglobins of the Bivalve Mollusc Anadara Trapezia

Abstract

The respiratory proteins of the invertebrate marine mollusc A. trapezia have been separated by a combination of gel filtration and ion-exchange chromatography. There is a major tetrameric haemoglobin, HbI, of molecular weight approximately 67000 and two minor polymorphic haemoglobins HbIIa and HbIIb that are dimeric with molecular weight approximately 31000, in agreement with previous reports in the literature.