So we've talked in a previous lecture

about how conserved the ribosome was

we've talked a little about how it may

have evolved through deep time to become

this more and more complicated structure.

But a more physical question that we could

ask about the ribosome is how efficient

or good is it at what it does. And so,

one perspective on that is this idea of

Landauer Bond. So what Landauer Bound

is in the physics community, is a way of

saying take a particular abstract

computation and tell me what is

the minimal amount of energy that

any physical device could use to implement

this abstract computation.

And what that turns out to be

in a general sense is

Boltzmann's constant

times Temperature times the change in

the entropy over the course of this

computation.So the Initial entropy at the

beginning of the computation minus the

final entropy after you've performed all

the computations you care about.

So we can take the ribosome and use

this perspective to say something about it