Pulsed EPR measurement of the distance between P680+. and Q(A)-. in photosystem II.
FEBS Lett
; 414(2): 454-6, 1997 Sep 08.
Article
em En
| MEDLINE
| ID: mdl-9315739
ABSTRACT
Out-of-phase electron spin echo envelope modulation (ESEEM) spectroscopy was used to determine the distance between the primary donor radical cation P680+. and the quinone acceptor radical anion Q(A)-. in iron-depleted photosystem II in membrane fragments from spinach that are deprived of the water oxidizing complex. Furthermore, a lower limit for the distance between the oxidized tyrosine residue Y(Z) of polypeptide D1 and Q(A)-. could be estimated by a comparison of data gathered from samples where the electron transfer from Y(Z) to P680+. is either intact or blocked by preillumination in the presence of NH2OH.
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Base de dados:
MEDLINE
Assunto principal:
Conformação Proteica
/
Complexo de Proteínas do Centro de Reação Fotossintética
Tipo de estudo:
Diagnostic_studies
Idioma:
En
Revista:
FEBS Lett
Ano de publicação:
1997
Tipo de documento:
Article
País de afiliação:
Alemanha