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Please use this identifier to cite or link to this item: http://hdl.handle.net/1807/19925

Title: RESEARCH NOTE - The Myoglobin and the Hemoglobin of Biomphalaria glabrata, an Evidence of Gene Duplications
Authors: Arndt, Márcio H. L.
Nascimento, Danielle G.
Xavier, Luciana P.
Santoro, Marcelo M.
Keywords: Biomphalaria glabrata - extracellular hemoglobin - erythrocruorin - protein evolution - planorbid - subunit structure
Issue Date: 31-Dec-1998
Publisher: Fundação Oswaldo Cruz, Fiocruz
Citation: Memórias do Instituto Oswaldo Cruz (ISSN: 1678-8060) Vol 93 Num s1
Abstract: Among invertebrate animals, hemoglobins and myoglobins (globins) occur in most but not all phyla and display a great variability in their primary and quaternary structure more than in their vertebrate counterparts. The invertebrate globins were divided in five distinct groups based on their structure: (1) single chain with one heme-binding domain; (2) single chain with a truncated heme-binding domain (with 100-120 residues instead of the common ~ 150 residues domain); (3) chimerical, one heme-binding domain (with the globin domain attached to unrelated proteins); (4) chimerical, two heme-binding domains covalently linked and (5) chimerical, multi heme-binding domain globins. The widespread occurrence in eukaryotes and prokaryotes suggests that the globins descended from a monomeric, single chain, single-domain globin existed prior to the time of divergence of eukaryotes and prokaryotes at 1,500-2,000 million years ago.
URI: http://hdl.handle.net/1807/19925
Other Identifiers: http://www.bioline.org.br/abstract?id=oc98159
Rights: Copyright 1998 Fundacao Oswaldo Cruz - Fiocruz
Appears in Collections:Bioline International Legacy Collection

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