Sakuagi, Y, Zybailov, B., Shen,
G., Chitnis, P., van der Est, A., Bittl, R., Zech, S., Stehlik, D., Golbeck,
J. and Bryant, D.(2001) Interruption of the menG Gene in the Phylloquinone
Biosynthetic Pathway of Synechocystis sp. PCC 6803. Alteration of the Equilibrium
Constant between A1 and FX by Incorporation of 2-Phytyl-1,4-Naphthoquinone
into Photosystem I Biochemistry (submitted).
Van der Est, A. (2001) Light-Induced Spin
Polarization in Type I Photosynthetic Reaction Centres Biochim. Biophys.
Acta (in press).
Kandrashkin, Yu., and van der Est, A. (2001)
A New Approach to Determining the Geometry of Weakly Coupled Radical Pairs
from their Electron Spin Polarization Patterns Spectrochim. Acta A (in
press).
Semenov, A., Vassiliev, I., van der Est,
A., Mamedov, M., Zybailov, B., Shen, G., Stehlik, D., Diner, B., Chitnis,
P., and Golbeck, J. (2000) Recruitment of a Foreign Quinone into the A1
Site of Photosystem I. III. Altered Electron Transfer Kinetics in Phylloquinone
Biosynthetic Pathway Mutants Studied by Time Resolved Optical, EPR, and
Electrometric Techniques J. Biol. Chem. 275 23429-23438.
Zybailov, B., van der Est, A., Zech, S.,
Teutloff, C., Johnson, W., Shen, G., Bittl, R., Stehlik, D., Chitnis, P.,
and Golbeck, J. (2000) Recruitment of a Foreign Quinone into the A1 Site
of Photosystem I. II. Structural and Functional Characterization of Phylloquinone
Biosynthetic Pathway Mutants by EPR and ENDOR Spectroscopy J. Biol. Chem.
275, 8531-8539.
Asano-Someda, M., van der Est, A., Krueger,
U., Stehlik, D., Kaizu, Y., and Levanon, H., (1999) Intramolecular Energy
Transfer in a Covalently Linked Copper (II) Porphyrin - Free Base Porphyrin
Dimer: Novel Spin Polarization in the Energy Acceptor, J. Phys. Chem. 103,
6704--6714.
Salikhov, K., van der Est, A., and Stehlik,
D. (1999) Spin Dynamics and EPR Spectral Simulations of Three-Spin Systems
in Photosynthetic Reaction Centres, Appl. Magn. Res 15,101-134.
van der Est, A., Hager-Braun, C., Leibl,
W., Hauska, G., and Stehlik, D. (1998) Transient EPR Spectroscopy on Green-Sulfur
Bacteria and Heliobacteria at two Microwave Frequencies, Biochim. Biophys.
Acta 1409, 87--98.
Kandrashkin, Y., Salikhov, K., van der
Est, A., and Stehlik, D. (1998) Electron Spin Polarization in Consecutive
Spin-Correlated Radical Pairs: Application to Short-Lived and Long-Lived
Precursors in Type 1 Photosynthetic Reaction Centres Appl. Magn. Res. 15,
417--447.
Kamlowski, A., Altenberg-Greulich, B.,
van der Est, A., Zech, S., Bittl, R., Fromme, P., Lubitz, W., and Stehlik,
D. (1998) The Quinone Acceptor A1 in Photosystem I: Binding Site,
and Comparison to QA in Purple Bacteria Reaction Centers, J. Phys. Chem
B 102,8278.
van der Est, A., Reiss-Husson, F., and
Stehlik, D. (1998) An investigation of the light-induced spin polarization
in reaction centres of Rhodobacter sphaeroides Y, Photosynth. Res. 55,
217--225.
Zech, S., van der Est, A.J., and Bittl,
R. (1997) Measurement of Cofactor Distances Between P700+ and A1- in Native
and Quinone Substituted Photosystem I using Pulsed EPR Spectroscopy, Biochemistry
36, 9774--9779.
van der Est, A., Prisner, T., Bittl, R.,
Fromme, P., Lubitz, W., Moebius, K., and Stehlik, D. (1997) Time resolved
X-, K-, and W-band EPR of the radical pair state P+A1- of Photosystem I
in comparison with P+QA- in bacterial reaction centres, J. Phys. Chem.
B 101, 1437-1443.
van der Est, A., Fuechsle, G., Stehlik,
D., and Wasielewski, M. (1997) Separation of the exchange and dipolar contributions
to the spin-spin coupling in the donor-acceptor complex TAPD-ZnP-NQ, Appl.
Mag. Res. 13, 317--335.
Kamlowski, A., van der Est, A., Fromme,
P., Krauss, N., Schubert, W.-D., Klukas, O., and Stehlik, D. (1997) The
Structural Organisation of the PsaC Protein in Photosystem I from Single
Crystal EPR and X-Ray Crystallographic Studies, Biochim. Biophys. Acta
1319, 199-213.
Kamlowski, A., van der Est, A., Fromme,
P., and Stehlik, D. (1997) Low temperature EPR on Photosystem I Single
Crystals: Orientation of the Iron-Sulfur Centers FA and FB, Biochim. Biophys.
Acta 1319, 185-198.
Rendell, J., Zimmerman, D., van der Est,
A.J., and Burnell, E. (1997) Orientational Order of 1,3-dichloro-2-ethenylbenzene
in Liquid Crystal Solvents, Can. J. Chem. 75, 1156--1161.
Kamlowski, A., Frankemoeller, L., van der
Est, A., Stehlik, D., and Holzwarth, A. (1996) Evidence for the Delocalization
of the Tiplet State 3P680 in the D1D2cytb559-Complex of Photosystem II,
Ber. der Bunsenges. Phys. Chem. 100, 2045--2051.
van der Est, A., Fuechsle, G., Stehlik,
D., and Wasielewski, M. (1996) X- and K-band Transient EPR of the Light
Induced Radical Ion Pairs in Photosynthetic Model Systems, Ber. Bunsenges.
Phys. Chem. 100, 2081--2085.
Stehlik, D., van der Est, A., and Kamlowski,
A. (1996) Time Resolved EPR Studies of Light-Induced Charge Separation
in Photosynthetic Reaction Centers, Mol. Phys. Rep. 13, 21--36.
Stehlik, D., van der Est, A., and Kamlowski,
A. (1996) Transient Spin States in the Primary Processes of Photosynthesis,
Ber. Bunsenges. Phys. Chem. 100, 2028--2035.
Hugerat, M., van der Est, A., Ojadi, E.,
Bicczok, L., Linschitz, H., Levanon, H., and Stehlik, D. (1996) Transient
EPR Studies of Ion-Paired Metallo-Porphyrin Heterodimers, J. Phys. Chem
100, 495--500.
van der Est, A. and Stehlik, D. (1995)
Stuctural and Functional Properties of the State P+Q-, in Reaction Centers
of Photosynthetic Bacteria (Michel-Beyerle, M. ed.), Springer Series in
Biophysics, p. 321, Springer, Berlin.
van der Est, A., Sieckmann, I., Lubitz,
W., and Stehlik, D. (1995) Differences in the binding of the primary quinone
acceptor in Photosystem I and reaction centres of Rhodobacter sphaeroides
R-26 studied with transient EPR spectroscopy., Chem. Phys. 194, 349--359.
Prisner, T., van der Est, A., Bittl, R.,
Lubitz, W., Stehlik, D., and Moebius, K. (1995) Time-resolved W-band (95
GHz) EPR spectroscopy of Zn-substituted reaction centers of Rhodobacter
sphaeroides R-26., Chem. Phys. 194, 361--370.
Bittl, R., van der Est, A., Kamlowski,
A., Lubitz, W., and Stehlik, D. (1994) Time-resolved EPR of the radical
pair P865+QA- in bacterial reaction centers. Observation of transient nutations,
quantum beats and envelope modulations, Chem. Phys. Lett. 226, 349--358.
van der Est, A., Bock, C., Golbeck, J.,
Brettel, K., Setif, P., and Stehlik, D. (1994) Electron transfer from the
acceptor A1 to the iron-sulfur centres in photosystem I as studied by transient
EPR spectroscopy, Biochemistry 33, 11789-11797.
van der Est, A., Bittl, R., Abresch, E.,
Lubitz, W., and Stehlik, D. (1993) Transient EPR Spectroscopy of Perdeuterated
Zn-Substituted Reaction Centres of Rhodobacter sphaeroides R-26, Chem.
Phys. Lett. 212, 561--568.
Fuechsle, G., Bittl, R., van der Est, A.,
Lubitz, W., and Stehlik, D. (1993) Transient EPR Spectroscopy of the Charge
Separated State +Q- in Photosynthetic Reaction Centers. Comparison of Zn-substituted
Rhodobacter sphaeroides R-26 and photosystem I, Biochim. Biophys. Acta
1142, 23--35.
Sieckmann, I., Brettel, K., Bock, C., van
der Est, A., and Stehlik, D. (1993) Transient Electron Paramagnetic Resonance
of the Triplet State of P700 in Photosystem I: Evidence for Triplet Delocalization
at Room Temperature, Biochemistry 32, 4842--4847.
Brettel, K., Sieckmann, I., Fromme, P.,
van der Est, A.., and Stehlik, D. (1992) Low Temperature EPR
on Single Crystals of Photosystem I, Study of the Iron-Sulfur-Center FA.,
Biochim. Biophys. Acta 1098, 266--270.
Sieckmann, I., van der Est,
A.., Bottin, H., Setif, P., and Stehlik, D. (1991) Nanosecond Electron
Transfer Kinetics in Photosystem I Following Substitution of Quinones
for Vitamin K1 as Studied by Time Resolved EPR, FEBS 284, 98--102.
Gierer, M., van der Est, A..,
and Stehlik, D. (1991) Transient EPR of Weakly Coupled Spin-Correlated
Radical Pairs in Photosynthetic Reaction Centres: Increased Spectral
Resolution from Nutation Analysis, Chem. Phys. Lett. 186, 238--247.
Schulz, M., van der Est, A..,
Rössler, E., and Vieth, H.-M. (1991) 2H NMR Study of Benzene-d6
in a Liquid-Crystalline Polysiloxane, Macromolecules 24, 5040--5045.
Bock, C., van der Est, A.J..,
Brettel, K., and Stehlik, D. (1989) Nanosecond Electron Transfer
Kinetics in Photosystem I as Obtained from Transient EPR at Room
Temperature, FEBS Lett. 247, 91--96.
van der Est, A.J.., Burnell, E.,
and Lounila, J. (1988) Molecular Hydrogen in Nematic Liquid Crystals:
Unusual Isotope Effects, J. Chem. Soc. Faraday Trans. 84, 1095--1108.
van der Est, A.J.., Burnell, E.,
Barnhoorn, J., de Lange, C., and Snijders, J. (1988) Acetylene in
Nematic Liquid Crystals: A Vibrational Analysis of the Observed Dipolar
Couplings, J. Chem. Phys. 89, 4657--4665.
Hoatson, G., Bailey, A., van der Est,
A.J., Bates, G., and Burnell, E. (1988) 2H-N.M.R. Studies of Flexibility
and Orientation Order in the Nematic Liquid Crystals, Liquid
Crystals 3, 683--694.
Kok, M., van der Est, A.J., and Burnell,
E. (1988) Orientation Order of Biaxial Solutes in the Nematic Phases:
Size and Shape Effects, Liquid Crystals 3, 485--505.
Burnell, E., van der Est, A.J.,
Patey, G., de Lange, C., and Snijders, J. (1987) NMR of Solutes in
Liquid Crystalline Solvents: Mechanisms of Orientational Ordering,
Bull. Mag. Res. 9, 4--19.
Weaver, A., van der Est, A.J..,
Rendell, J., Hoatson, G., Bates, G., and Burnell, E. (1987) Orientation
Mechanisms for Small Solutes in the Nematic Liquid Crystal 5CB-ab-d4,
Liquid Crystals 2, 633--642.
van der Est, A.J.., Kok, M., and
Burnell, E. (1987) Size and Shape Effects on the Orientation of Rigid
Molecules in Nematic Liquid Crystals, Mol. Phys. 60, 397--413.
van der Est, A.J., Barker, P., Burnell,
E., de Lange, C., and Snijders, J. (1985) NMR of Methane in Liquid
Crystal Mixtures, Mol. Phys. 56, 161.
Barker, P., van der Est, A.J.,
Burnell, E., Patey, G., deLange, C., and Snijders, J. (1984) NMR
of Deuterium in Liquid Crystal Mixtures, Chem. Phys. Lett. 107, 426--430.
Frankemoeller, L., Kamlowski, A.,
Krueger, U., van der Est, A., and Stehlik, D. (1998) A Transient EPR Study
of the Temperature and Orientation Dependence of the Spectrum of 3P680
in Photosystem II, in Magnetic Resonance and Related Phenomena, Proceedings
of the Joint 29th AMPERE-13th ISMAR International Conference (Ziessow,
D., Lubitz, W., and Lendzian, F.eds.), volume II, pp. 939--940, Technische
Universität, Berlin.
Kandrashkin, Yu., van der Est,
A., Salikhov, K., and Stehlik, D. (1998) EPR Spectra of Consecutive Spin
Correlated Radical Pairs, in Magnetic Resonance and Related Phenomena,
Proceedings of the Joint 29th AMPERE-13th ISMAR International Conference
(Ziessow, D., Lubitz, W., and Lendzian, F.eds.), volume II, pp. 951--952,
Technische Universität, Berlin.
van der Est, A., Kamlowski, A., Altenberg-Greulich,
B., and Stehlik, D. (1998) A Comparison of the Quinone Binding Sites in
Photosystem I and Purple Bacteria, in Photosynthesis, Mechanisms and Effects
(Garab, G. ed.), Kluwer, Vol. I, pp 551--554.
van der Est, A., Scheller, H., Hager-Braun,
C., Hauska, G., and Stehlik, D. (1998) Forward Electron Transfer in
Chlorobium Reaction Centres Studied by Transient EPR, in Proceedings of
the XIth International Congress on Photosynthesis, Budapest (Garab, G.
ed.), Kluwer, Vol. I, pp 547--550.
van der Est, A. and Stehlik, D. (1996)
Multi-Frequency Transient EPR of Photoinduced Weakly Coupled Radical Pairs,
in Magnetic Resonance and Related Phenomena, Proceedings of the 28th Congress
AMPERE (Smith, M. and Strange, J. eds.), pp. 83--84, Universtiy of Kent
at Canterbury
Kamlowski, A., Deligiannakis, Y., van der
Est, A., Bittl, R., Kurreck, J., Rutherford, A., and Stehlik, D. (1996)
Time-Resolved EPR on Transient Radicals and Radical Pairs in Photosystem
II, in Magnetic Resonance and Related Phenomena, Proceedings of the 28th
Congress AMPERE (Smith, M. and Strange, J. eds.), pp. 275--276, Universtiy
of Kent at Canterbury.
Kamlowski, A., van der Est, A., and Stehlik,
D. (1995) The Triplet State 3P680 in Photosystem II Studied with Time-Resolved
EPR, in Photosynthesis: From Light to Biosphere (Mathis, P. ed.), volume
I, pp. 787--790, Kluwer.
Kamlowski, A., van der Est,
A., Fromme, P., and Stehlik, D. (1995) Structural Organization of the Acceptors
A1, FX,FA and FB in Photosystem I from EPR in Solution and Single Crystals,
in Photosynthesis: From Light to Biosphere (Mathis, P. ed.),volume II,
pp. 29--34, Kluwer.
van der Est, A., Sieckmann, I., Lubitz,
W., and Stehlik, D. (1995) Quinone Binding in Rhodobacter Sphaeroides
and Photosytem I studied by transient EPR., in Photosynthesis: From Light
to Biosphere (Mathis, P. ed.), volume II, pp. 143--146, Kluwer.
Bittl, R., van der Est, A.,
Fuechsle, G., Lubitz, W., and Stehlik, D. (1993) Transient EPR of Photosynthetic
Reaction Centers: Structural Information on the Radical Pair P+Q- in Zn-substituted
Rb. Sphaeroides and photosystem I., in Proceedings IXth International Congress
on Photosynthesis, Nagoya (Murata, N. ed.), Kluwer Acad. Publ., Dordrecht