Today, I spent the first hour with Ptra Fromme. She carried on with her tutorialabout PS2 and PS1.Show highlights
PS1 and PS2 evolved 2.5 billion years ago. PS1 in cynobacteria now have the abilties to absorb green light using phycobilisones anttennae. Plants can only absorb blue and red light.
It crstallization you add sucrose to act as a cryogenic protector(Stops ice crystals forming)
PS1 has 96 chlorophylls apparantly randomly placed. But there is a reason for there positioning. They act as a net so there are multiple pathways. Aslo the different orientations allow light from any direction to be absorbed.
Carotene is in the PS1 molecule and acts as sunscreen as an antioxidant.

PS2 is a water splitter molecule. Understanding it may win a Nobel prize. The core of the PS2 is 4 manganese atoms. Understanding this structure is very difficult.

I then spent time with Han a researcher. He is looking at GFP(green flourescent protein). He has a mutant which works. He istrying to crstallize it to see how different its structure is.
We also went to the X-ray diffraction lab.