Erythrocruorins of Euzonus mucronata treadwell: Evidence for a dimeric annelid extracellular hemoglobin

Nonvertebrate Hemoglobins: Functions and Molecular Adaptations

“…Early electron microscopic studies of annelid extracellular Hbs revealed them to consist of two superimposed layers of six pentagonally shaped subassemblies, ϳ20 nm high and ϳ30 nm in diameter, surrounding a central cavity (455,610). In several cases, material was observed in the central cavity in the marine polychaetes Oenone fulgida (598), Nephtys incisa (381,651), Euzonus mucronata (565), and Ophelia bicornis (77,184) as well as in the oligochaete Eophila tellini (78). Several studies used small-angle X-ray scattering to investigate the molecular shape and mass of HBL Hbs (381, 432a, 433a, 566a, 659b).…”

Nonvertebrate Hemoglobins: Functions and Molecular Adaptations

“…Early electron microscopic studies of annelid extracellular Hbs revealed them to consist of two superimposed layers of six pentagonally shaped subassemblies, ϳ20 nm high and ϳ30 nm in diameter, surrounding a central cavity (455,610). In several cases, material was observed in the central cavity in the marine polychaetes Oenone fulgida (598), Nephtys incisa (381,651), Euzonus mucronata (565), and Ophelia bicornis (77,184) as well as in the oligochaete Eophila tellini (78). Several studies used small-angle X-ray scattering to investigate the molecular shape and mass of HBL Hbs (381, 432a, 433a, 566a, 659b).…”

Nonvertebrate Hemoglobins: Functions and Molecular Adaptations

“…Early electron microscopic studies of annelid extracellular Hbs revealed them to consist of two superimposed layers of six pentagonally shaped subassemblies, ϳ20 nm high and ϳ30 nm in diameter, surrounding a central cavity (455,610). In several cases, material was observed in the central cavity in the marine polychaetes Oenone fulgida (598), Nephtys incisa (381,651), Euzonus mucronata (565), and Ophelia bicornis (77,184) as well as in the oligochaete Eophila tellini (78). Several studies used small-angle X-ray scattering to investigate the molecular shape and mass of HBL Hbs (381, 432a, 433a, 566a, 659b).…”

Nonvertebrate Hemoglobins: Functions and Molecular Adaptations

“…Early electron microscopic studies of annelid extracellular Hbs revealed them to consist of two superimposed layers of six pentagonally shaped subassemblies, ϳ20 nm high and ϳ30 nm in diameter, surrounding a central cavity (455,610). In several cases, material was observed in the central cavity in the marine polychaetes Oenone fulgida (598), Nephtys incisa (381,651), Euzonus mucronata (565), and Ophelia bicornis (77,184) as well as in the oligochaete Eophila tellini (78). Several studies used small-angle X-ray scattering to investigate the molecular shape and mass of HBL Hbs (381, 432a, 433a, 566a, 659b).…”