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Post Doctoral Position(s)

Vasilis Petrouleas vpetr at ims.demokritos.gr
Tue Feb 1 04:47:27 EST 2000


 in the framework of the EC TMR network program we have one-two post 
doctoral openings in the group for work in Photosynthesis with 
emphasis on Photosystem II (PSII). The positions are immediately 
available. Our current research activities are outlined below.

In parallel with our continuing studies of the acceptor side of PSII 
(Sanakis et al JACS 121, 9155-9164 (1999)) a considerable part of our 
research effort is devoted recently to the study of the oxygen 
evolving complex. Our approach includes the reversible interaction of 
small molecules (NO, CN-, …) with the Mn cluster and the tyrosines 
but also the straightforward study of integer spin S states.  The 
chemical modification of Tyr YD to a new radical species has been 
described earlier [Sanakis et al. (1997) Biochemistry 36, 1411-1417], 
and recently we reported on the formation of a unique intermediate of 
the Mn cluster assigned to a Mn(II)-Mn(III) dimer resulting from a 
state probably lower than S0 [Goussias et al. (1997) Biochemistry 36, 
9261-9266; Sarrou et al. (1998) Biochemistry accelerated 37, March 
17, 3581-3587]. We are currently working on the physiological S3 
state. We recently submitted an accelerated paper to Biochemistry 
reporting a metalloradical EPR signal from this state. The 
metalloradical character of the S3 state is supported by flash 
fluorescence experiments indicating an unusually fast concerted 
reduction by NO to the S1 state (paper in press). A number of 
collaborative projects, including EXAFS studies are also in progress 
and the candidate will benefit from the interaction with a number of 
prominent groups participating in the network.

Our facilities here include EPR spectroscopy (cw and access to pulsed 
EPR and ENDOR), flash fluorescence, flash O2 techniques, optical 
assay techniques and also, for certain applications, Mossbauer 
spectroscopy and magnetic susceptibility. We expect that during the 
course of the post doctoral period our facilities will be extended to 
higher frequency EPR.

Potential candidates must be EC nationals and should have some 
background in Photosynthesis and EPR spectroscopy and/or 
flash-fluorescence and flash-oxygen techniques.


Inst. Mat. Sci., NCSR "Democritos"

15310 Aghia Paraskevi Attikis


phone: (+301) 650 3344. Fax: (+301) 651 9430

e-mail: vpetr at ims.Demokritos.gr


</smaller>Dr Vasili Petrouleas 
	e-mail:vpetr at ims.demokritos.gr

Inst. Mat. Sciences / NCSR "Democritos		phone: +301 650-3344, 650-3312

15310 Aghia Paraskevi Attikis, Greece		Fax:   +301 651-9430



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