Lots and lots of energy. This is where we
are going to form an electrochemical gradient
using all of these electrons in order to pump
hydrogen ions and make the maximum amount of ATP.
So the majority of ATP is made in the electron
transport chain. I can't emphasize that enough.
It will come up on test questions over and over. ATP is
made in the electron transport chain and chemiosmosis.
People often think that it comes from the Krebs cycle.
No. Lots of the energy comes from the Krebs cycle,
but it's on electron transporters getting ready to go
to the main event. So ATP synthase,
is the enzyme that I've introduced before that is
involved in this oxidative phosphorylation right.
We had substrate level and now we have oxidative
phosphorylation is going to happen in
the process of chemiosmosis and the electron transport
chain. So, now we move into looking at
what has happened so far and where we're going. So,
we have NADH and FADH electron carriers.
We've got some of them NADH's from glycolysis. We got
some of them from pyruvate oxidation.
Just 2 from each. For each glucose molecule. But now,
we've had a lot of them coming from the Krebs cycle.
It's time to take them to the electron transport chain
where we will create a proton gradient using
proton pumps. This is where the hydrogens come into
play. They didn't just come along for no reason.
We're going to pump hydrogens into the intermembrane
space in the mitochondria and that's going to create
an electrochemical gradient that they don't like.
And so they are going to whizz through ATP synthase
and the speed of them whizzing through ATP synthase
will result in making lots and lots of ATP.
So it's the energy of spinning ATP synthase
that really does it all.