Studies on Monotreme Proteins. VI. Amino Acid Sequence of the ß-Chain of Haemoglobin From the Platypus, Ornithorhynchus anatinus

Abstract

The amino acid sequence of the 146 residues of the p-chain of the major haemoglobin from the platypus has been determined. The soluble peptides derived from the chain by tryptic digestion were isolated by paper ionophoresis and chromatography. The amino acid sequences were determined by the dansyl-Edman procedure or by further digestion with other enzymes. The tryptic peptides were aligned by homology with other p-globins. There were 14 changes in sequence compared with echidna p-chain.