"Gloeocapsa Magma" belongs to a class of cyanobacteria (Blue Green
algae) which are thalakoid in nature.  They are responsible for the
black streaks often seen down the sides of roof shingles.  Low
concentrations of Copper or Zinc metal in solution are toxic to the
algae.
I need more knowledge about the exact mechanism as to how Copper and
Zinc metals are toxic to the alga in question. Information needed to
include:
a) Structure of gloeocapsa magma, in particular its membrane / capsid structure
b) Sensitivity to oxygen concentration, and how this affects its
photosynthetic rate.
c) Mechanism of membrane action with metal ions and how the metal ions
provide toxicity.  Might enzyme action be a factor?  If so, are metal
ions acting as a non-competitive inhibitor?
Please be very specific in your answers