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Electron Transfer in Flavodoxin-based Redox Maquettes Alagaratnam, S.

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Electron Transfer in Flavodoxin-based Redox Maquettes

Alagaratnam, S.

Citation

Alagaratnam, S. (2005, October 24). Electron Transfer in Flavodoxin-based Redox

Maquettes. Retrieved from https://hdl.handle.net/1887/3488

Version:

Corrected Publisher’s Version

License:

Licence agreement concerning inclusion of doctoral thesis in the

Institutional Repository of the University of Leiden

Downloaded from:

https://hdl.handle.net/1887/3488

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Stellingen 

   

1. Opposing  factors  can  contribute  simultaneously  to  the  balance  of  a  protein’s  redox  potential.  

      Chapter 3, this thesis 

 

2. Despite  being  solvent‐exposed,  the  copper  ion  in  water‐bound  His117Gly  azurin  is  less  reactive to photoexcited 5‐deazariboflavin than either the wild type or imidazole‐bound  equivalent.  

      Chapter 4, this thesis 

 

3. Low  dissociation  constants  are  a  precondition  for  the  application  of  cofactor  reconstitution in the study of non‐covalent complexes of biological molecules. 

      Chapter 6, this thesis 

 

4. Long  linker  regions  greatly  affect  the  position  and  as  such  the  action  of  an  attached  photolabel on flavodoxin, regardless of site‐specific attachment.  

Chapter 7, this thesis 

 

5. Intrinsic  reactivity  does  not  exist  in  biological  electron  transfer,  only  relative  reactivity  that is dependent on the particular redox partner.  

Gorren et al. (1996) FEBS Lett. 381:140‐2 

 

6. The  presence  of  the  semiquinone  form  of  FMN  which  leads  to  behaviour  deviant  from  classical  Nernstian  should  be  considered  when  fitting  spectroelectrochemical  data  on  SnO2‐PLL  film‐immobilized  FMN  for  the  determination  of  Em,  for  the  two‐electron 

reduction of FMN.  

Astuti et al. (2004) J. Am. Chem. Soc., 126: 8001‐9 

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7. Flavins bound by flavoproteins can be and are directly reduced by light excitation in the  absence  of  external  mediators,  however  these  states  are  quenched  on  timescales  in  the  order of pico to nanoseconds.  

van den Berg et al. (1998) Biophys. J. 74:2046‐58 

       

8. Certain properties of proteins such as redox potentials and structural characteristics can  more  usefully  be  considered  as  varying  continuums  that  occasionally  overlap,  as  opposed to categorization into discrete classes.  

Steensma et al. (1998) Protein Sci. 7:306‐17 

  9. Similarly so with humans.  

 

10. Democracy  in  its  current  incarnation  does  not  sufficiently  address  the  needs  of  multi‐ ethnic states. 

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