A high-affinity hemoglobin is expressed in the notochord of amphioxus, Branchiostoma californiense.

From: The Biological Bulletin | Date: December 1, 1998| Author: Bishop, Jamie J.; Doeller, Jeannette E.; Green, David B.; Kraus, David W.; Vandergon, Thomas L. | Copyright information

In the phylum Chordata, only members of the subphylum Vertebrata were thought to express hemoglobin (Hb). Here we document the existence of intracellular Hb expressed in members of the subphylum Cephalochordata. Hemoglobin is expressed in myotome tissue and in notochord cells within the body of amphioxus. Both notochord and myotome tissue Hbs have a molecular size consistent with a dimeric molecule made up of two non-covalently linked monomers each of approximately 19 kD. The notochord Hb has...

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