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BC10M: Introductory Biochemistry, 2005 Semester 2.

BC10M: Introductory Biochemistry, 2005 Semester 2. Thursday 24 Mar. Lecture 28 N 2 & CO 2 fixation Nitrogen metabolism & photosynthesis Andrew Pearson. N 2 metab. Approx. 16 ATPs/ N 2 fixed. N 2 metab. N 2 metab. N 2 metab. N 2 metab. Inter-organ N transfer. N 2 metab.

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BC10M: Introductory Biochemistry, 2005 Semester 2.

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  1. BC10M: Introductory Biochemistry, 2005 Semester 2. • Thursday 24 Mar. • Lecture 28 • N2 & CO2 fixation • Nitrogen metabolism & photosynthesis • Andrew Pearson

  2. N2 metab.

  3. Approx. 16 ATPs/ N2 fixed N2 metab.

  4. N2 metab.

  5. N2 metab.

  6. N2 metab.

  7. Inter-organ N transfer N2 metab.

  8. N2 metab.

  9. N2 metab.

  10. Polymerases Nucleic acid Endonucleases Nucleoside triphosphates NTPs, dNTPs oligonucleotides Phosphodiesterase Monophospho- nucleotides NMPs, dNMPs Pi Nucleotidase Pi Phospho- ribosyl transferases Pi Nucleosides Phosphorylases Pi PRPP (phospho- ribosyl pyro- Phosphate) Bases Ribose- 1-phosphate N2 metab. Degradation

  11. N2 metab.

  12. N excretion compounds N2 metab.

  13. Simplified Calvin cycle CO2 fixn.

  14. CO2 fixn.

  15. CO2 fixation occurs in the stroma Sucrose synthesis occurs in the cytosol CO2 fixn.

  16. CO2 fixation using the C4 NADP-malic enzyme CO2 fixn.

  17. C4 pathway using NAD-malic enzyme C4 pathway using PEP-carboxykinase CO2 fixn.

  18. Conversion of sucrose to starch CO2 fixn.

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