Astyanax scabripinnis (Pisces: Characidae) hemoglobins: structure and function
Braz. j. biol
; 62(4a): 595-599, Nov. 2002. ilus, tab, graf
Article
em En
| LILACS
| ID: lil-335615
Biblioteca responsável:
BR1.1
RESUMO
Electrophoretic patterns of hemoglobins, Root effect, Bohr effect in blood and stripped hemoglobin, Hb-O2 affinity GTP modulation of Astyanax scabripinnis (lambari), caught at three different altitudes in Ribeiräo Grande, near Campos do Jordäo (Säo Paulo), are described. All populations showed the same electrophoretic patterns two cathodal components in starch gel. Normal Bohr effect values were found in these three populations both in blood (phi = -0,11) and stripped hemoglobin (phi = -0,12). Different blood O2 affinities collected in fish of these 3 populations were detected. GTP has a large influence on Hb-O2 binding properties in A. scabripinnis. Stripped hemoglobin shows small Root effect. The addition of triphosphated nucleotides increases this effect. GTP is more effective than ATP on enhancing Root effect. Oxygen availability in water can be the factor responsible for differences found in blood O2 affinity
Texto completo:
1
Coleções:
01-internacional
Base de dados:
LILACS
Assunto principal:
Hemoglobinas
/
Peixes
Limite:
Animals
País/Região como assunto:
America do sul
/
Brasil
Idioma:
En
Revista:
Braz. j. biol
Assunto da revista:
BIOLOGIA
Ano de publicação:
2002
Tipo de documento:
Article
País de afiliação:
Brasil
País de publicação:
Brasil