| amino acid sequence of the monomer subunit of the giant extracellular hemoglobin of the aquatic oligochaete, tubifex tubifex. | the extracellular hemoglobin of the aquatic oligochaete tubifex tubifex consists of four subunits: a monomer of 16.5 kda, a disulfide-bonded trimer of about 50 kda and at least two subunits of about 30 kda. the complete amino acid sequence of the monomeric subunit was determined: it consists of 141 amino acid residues and has a molecular mass of 16,286 da including a heme group. 39 residues (28%) were found to be identical with those in the corresponding positions in the monomeric globin chains ... | 1990 | 2253625 |